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Equipment Discussions >> Binoculars

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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Low mag Binocs
      #5508794 - 11/07/12 06:04 PM

I am looking for a low magnification binoculars, but with wide FOV. It will be mainly used to locate faint constellation stars (stars that are part of the constellation pattern, but difficult to see from light polluted skies). I was thinking about 6 x 30, but cannot find a good model designed for astronomy.
Any recommendations?

Thanks in advance!

Clear skies!


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BillC
on a new path
*****

Reged: 06/04/04

Loc: Lake Stevens, WA, USA
Re: Low mag Binocs new [Re: rhophi]
      #5508850 - 11/07/12 06:53 PM

Hi rhophi:

A bino is what it is what it is; very few are “designed” for astronomy, in that is a tiny niche of the market (read no profit for the manufacture.)

In larger sizes, there are some models that have been designed with that niche in mind, but often as an afterthought. Also, as a rule, a low magnification, by its nature, indicates a wide field of view.

Thus, putting a lot of emphasis on designed for “astronomy,” may take away from your time under the stars.

My recommendation would be to seek out an 7x35, 8x30 or 32 or an 8x40 or 42 or 10x40 or 42. Plan to spend >$250 if you spend a reasonable amount of time under the stars, or if your instrument will also be used for day-time nature study.

Also, while lower powers WILL give you prettier vistas, in light polluted areas, it may be advisable to use HIGHER magnifications. The stars won’t be any bigger, but “skyfog” will be lessened—creating a more contrasty images.

And, whatever you do . . . have fun!

Finally, since I haven’t seen you post before, welcome to Cloudy Nights.

Cheers,

BillC


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: BillC]
      #5508896 - 11/07/12 07:20 PM

Hi BillC,

Thanks for your recommendation.

Sorry for the confusion, when I mentioned that I am looking for binoculars designed for Astronomy, I mean that it is a proven Binocular under the night sky, no false color (CA) on bright objects.

I am looking for a bino that is enough to enhance my naked vision, so I can see 3 - 4 magnitude stars in Capricornus without getting far too deep in to the deep sky. (I can still see a great part of the constellation).

Clear skies!


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BillC
on a new path
*****

Reged: 06/04/04

Loc: Lake Stevens, WA, USA
Re: Low mag Binocs new [Re: rhophi]
      #5508961 - 11/07/12 08:06 PM

Hi Again:

If you wait for a "no CA" bino, you will die of old age while waiting; you just need to keep it good for the magnification and your budget. If I were still at Captain's, I'd test some for you. However, I need to leave you with those more in tune with today's models; many of which are yesterday's models, with a new look and price tag. But, I'm not in a position to know which is which.

Recently we've had a thread on Nikon Action vs Action Extreme. I've looked through, and sold, hundreds of each. However, unless a customer asked me to do so, I didn't go "A" type on the project--sorry.

Never fear, there are some very knowledgeable observers on Cloudy Nights!

BillC


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The Ardent
scholastic sledgehammer
*****

Reged: 10/24/08

Loc: Virginia
Re: Low mag Binocs new [Re: rhophi]
      #5508983 - 11/07/12 08:23 PM

Consider something like this Swaro.

Small, lightweight, and the highest quality. Good for day or night use.

Or the small Canon IS.
The IS will allow you to see fainter stars, but are not much wider than what you have now.

Good Luck


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dan_h
Carpal Tunnel


Reged: 12/10/07

Re: Low mag Binocs new [Re: rhophi]
      #5509033 - 11/07/12 08:59 PM

Quote:

Hi BillC,

Thanks for your recommendation.

Sorry for the confusion, when I mentioned that I am looking for binoculars designed for Astronomy, I mean that it is a proven Binocular under the night sky, no false color (CA) on bright objects.

I am looking for a bino that is enough to enhance my naked vision, so I can see 3 - 4 magnitude stars in Capricornus without getting far too deep in to the deep sky. (I can still see a great part of the constellation).

Clear skies!




It has been my experience that a bino has to be pretty poor to show false color on stars at the very low powers used for hand held instruments.

As far as enhancing naked eye views, in my suburban backyard yard I find my 10X50s are a reasonable match to a Mag 8.5 star atlas that I use. A 7X35 will provide a much wider view but won't go quite so deep. The 7X35s are also a lot easier for hand holding and freely sweeping the sky.

dan


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: The Ardent]
      #5509076 - 11/07/12 09:34 PM

Quote:

Consider something like this Swaro.

Small, lightweight, and the highest quality. Good for day or night use.

Or the small Canon IS.
The IS will allow you to see fainter stars, but are not much wider than what you have now.

Good Luck




Hi Ray,

Thanks for the links, the Swarovski 8x30 CL look very interesting, but $$ beyond my budget.
In regards to the Canon 10 x 30 IS, I am seriously considering those, however I think the 10X may be way too much magnification for what I want to achieve.

Thanks!


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: dan_h]
      #5509087 - 11/07/12 09:43 PM

Quote:

Quote:

Hi BillC,

Thanks for your recommendation.

Sorry for the confusion, when I mentioned that I am looking for binoculars designed for Astronomy, I mean that it is a proven Binocular under the night sky, no false color (CA) on bright objects.

I am looking for a bino that is enough to enhance my naked vision, so I can see 3 - 4 magnitude stars in Capricornus without getting far too deep in to the deep sky. (I can still see a great part of the constellation).

Clear skies!




It has been my experience that a bino has to be pretty poor to show false color on stars at the very low powers used for hand held instruments.

As far as enhancing naked eye views, in my suburban backyard yard I find my 10X50s are a reasonable match to a Mag 8.5 star atlas that I use. A 7X35 will provide a much wider view but won't go quite so deep. The 7X35s are also a lot easier for hand holding and freely sweeping the sky.

dan




Hi Dan,

Thanks for yor input.
A 7 x 35 may do the trick, and there are plenty available out there. But I am almost certain that 6X or lower will work best.
About my concern with CA is that I may want to look at Sirius, Vega or Venus once in a while, and it would be annoying for me to see false color on these bright objects.

Clear skies!


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ronharper
Carpal Tunnel
*****

Reged: 02/14/06

Re: Low mag Binocs new [Re: rhophi]
      #5509275 - 11/08/12 12:31 AM

This came up in a recent discussion.
Chinese 6x24

Neither I, nor probably nobody else here, has any experience with this model. But I like the looks of it, and the look of the coatings as can be seen from the photo, and the wide field, which with the small aperture fits your purpose to a tee. The individual focusing could almost qualify it as "for astronomy"! To tell the truth, if I was after a 6x binocular, I'd buy one of these.
Ron


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Grimnir
super member


Reged: 04/28/10

Loc: London, England.
Re: Low mag Binocs new [Re: ronharper]
      #5509318 - 11/08/12 01:59 AM

Quote:


Also, as a rule, a low magnification, by its nature, indicates a wide field of view.





Except when combined with a large exit pupil.


Try to test:

Kowa (or Leupold or Opticron or Vortex) 6x30
Nikon 8 x 30 EII (wide field of view)
Canon 10 x 30 IS

I have all three and regard the Canons as the best of them for astronomy.


Regards,

Graham


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Mark9473
Postmaster
*****

Reged: 07/21/05

Loc: 51°N 4°E
Re: Low mag Binocs new [Re: Grimnir]
      #5509373 - 11/08/12 03:57 AM

I haven't seen any 7x or 8x porro binocular show detectable CA on bright stars. You'll much sooner be bothered by other aberrations that prevent the stars from showing as pinpoint dots.

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RichD
Carpal Tunnel


Reged: 11/08/07

Loc: Derbyshire, UK
Re: Low mag Binocs new [Re: Mark9473]
      #5509408 - 11/08/12 05:42 AM

A good 8x30/32 is quite nice for astro use. 7.5 deg field and moderate exit pupil for good contrast. If you are willing to spend the $$$ then the Fuji 8x30 FMTR-SX is very good, I use mine as a spotter when out with the scope but it's fun in it's own right. but there are many others.

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Tony Flanders
Postmaster
*****

Reged: 05/18/06

Loc: Cambridge, MA, USA
Re: Low mag Binocs new [Re: Grimnir]
      #5509418 - 11/08/12 06:13 AM

Quote:

Quote:


Also, as a rule, a low magnification, by its nature, indicates a wide field of view.





Except when combined with a large exit pupil.




Eh, what? I don't see any connection at all between exit pupil and field of view.

I love my Canon IS 10x30s, but I would never call them widefield binoculars. There are plenty of fields that I prefer to view in my decades-old 7x35s.


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Binojunky
Carpal Tunnel
*****

Reged: 12/25/10

Re: Low mag Binocs new [Re: Tony Flanders]
      #5509484 - 11/08/12 07:47 AM

Good can come at a very low price, Leupold Yosemite 6x30, very light and a FOV of 8 degrees,cost? around $100,DA.

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REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Low mag Binocs new [Re: Binojunky]
      #5509559 - 11/08/12 09:01 AM

I have many pairs of bino's that I have collected over the years and different styles.

I would advise a Roof Prism type over a Porro prism style. They are easier for me to hold and my favorite is an old Russian pair of 7x35....tack sharp and good contrast.

Ckeck out the Nikon line for under $200.

Bob


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Grimnir
super member


Reged: 04/28/10

Loc: London, England.
Re: Low mag Binocs new [Re: REC]
      #5509584 - 11/08/12 09:28 AM

Tony,

Assuming we are discussing binos without unacceptable aberrations, simultaneously increasing the exit pupil and the FoV requires increased ocular size and this requires significantly increased prism size.

So the bino designer can choose at most two from:

1. Manageable prism size
2. Wide FoV
3. Large exit pupil

So there's a tradeoff in bino design, the designer can choose any two but not all three.

In reality designers reject large prism designs as they're too bulky so if the designer wants an exit pupil of 7mm then he has to accept a significantly smaller FoV, relative to its magnification, than for, say, a 5mm exit pupil on an otherwise identical instrument. This is why, for example, high quality binos like the Nikon Prostar 7x50 and the Zeiss 7x50 GA T*, despite their low magnification, have a relatively narrow FoV.

The Nikon 8x30 EII are 8.8* and the Canon 10x30 IS 6.0* according to their specs. These are roughly right though I have not checked them in earnest against detailed starcharts. Neither show CA on (e.g.) Sirius. I agree that the Canons are not wide angle but the OP mentioned that he was seriously considering them so I thought it worthwhile to mention that, for astronomy, I prefer them to my Nikon EII 8x30. The Canons are by far the most-used of my binos and they're very handy so I always take them with me when I'm away. I also have a pair of Jason Statesman 186 7x35 12.7* claimed though I have not tested this claim.


Graham


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cloud_cover
professor emeritus


Reged: 08/17/10

Loc: Restaurant at the End of the U...
Re: Low mag Binocs new [Re: Grimnir]
      #5509597 - 11/08/12 09:39 AM

I'd recommend a Nikon Action Ex 10x50. It has wide angle eyepieces so your FOV is about 6 deg. Its (relatively) cheap, very well balanced so its less straining to hold it up.
Its also waterproof so you don't have to worry about dew.
I use it personally as a spotter bino or sometimes when I'm working late and just want something to use when I step out.
2 downsides are that being a fast, wide field bino, it has field curvature and some CA but personally I don't find these objectionable at all. YMMV
I see its currently $150 on Amazon.


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Plan9
professor emeritus


Reged: 01/28/08

Loc: Northern VA
Re: Low mag Binocs new [Re: rhophi]
      #5509678 - 11/08/12 10:31 AM

rhophi,

Have you seen these: Vortex 6x32

(not promoting Eagle, they just have that bin on sale, although my experience with them has been good).

Bill


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Rich V.
Post Laureate
*****

Reged: 01/02/05

Loc: Lake Tahoe area, Nevada, USA
Re: Low mag Binocs new [Re: Tony Flanders]
      #5509733 - 11/08/12 11:02 AM

Quote:

Quote:

Quote:


Also, as a rule, a low magnification, by its nature, indicates a wide field of view.





Except when combined with a large exit pupil.




Eh, what? I don't see any connection at all between exit pupil and field of view.

I love my Canon IS 10x30s, but I would never call them widefield binoculars. There are plenty of fields that I prefer to view in my decades-old 7x35s.




It seems to me Graham's statement is generally based in fact. Binoculars with a large exit pupil DO tend to have smaller AFOVs; this in turn obviously makes their FOVs on the smaller side as well.

Cases in point with binos with 7mm exit pupils:

Nikon Action EX 7x50---44.9° AFOV
Steiner Police 7x50---47.3°
Swift Sea Wolf 7x50---52.5°
Vixen Geoma 7x50--46.3°
Zeiss 8x56---55°
Vortex 8x56---50°
Swaro 8x56---52.7°
Celestron 8x56---46.25°

Even the little Leupold 6x30 with its 8° FOV only provides a 48° AFOV. Certainly not "wide field" when compared to an 8x30 like the Nikon EII that provides an 8.8° FOV with a 70° AFOV, for instance.

I wouldn't call any of the above listed binos "wide field" instruments except in the context of their relatively low magnification.

Rich


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Fomalhaut
scholastic sledgehammer


Reged: 08/16/08

Loc: Switzerland
Re: Low mag Binocs new [Re: Rich V.]
      #5509797 - 11/08/12 11:33 AM

- The new Swarovision EL-8x32 (with 4 mm pupil) has got 423 ft from 1000 yds which translates to 61 deg AFOV and 8 deg TFOV according to Swarovskis own specifications.
- The EL-8.5x42 (5 mm pupil): 60 deg / 7.6 deg accordingly.
- My Zeiss 7x42 P*T (6mm pupil) had also 60 deg AFOV.

The two Swarovskis deliver pinpoint stars to the edge.

These binoculars IMO come very close to the ideal wide FOV instrument, but they do so at a proud price.

Chris


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Binojunky
Carpal Tunnel
*****

Reged: 12/25/10

Re: Low mag Binocs new [Re: Fomalhaut]
      #5509931 - 11/08/12 01:00 PM

Hekova difference in price between the Yosemite and the Swarovskis or the Nikon E11 for that matter,Zeiss make a couple of 8x30 models but again at a premium price, to be honest most times when grabbing a bino for a look at the sky a 8x40 does the job very well, either a roof or prism,DA.

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Pinewood
Pooh-Bah


Reged: 12/07/04

Loc: 40.77638º N 73.982652 W
Fujinon new [Re: Binojunky]
      #5509981 - 11/08/12 01:31 PM

Hello all,

Regarding RhoPhi's original request for a 6x30. Fujinon may still sell a 6x30, the AR-SX, which is better than any old military 6x30. It uses independent focussing, is waterproof, and has modern coatings. I recall one cold night in New York City, when it revealed one one of Jupiter's moons, which I thought was pretty good for a 6x30.
Unlike other posters, I personally could not use an 8x40, handheld, on the night sky, for anything except the horizon, but I am nearing Medicare age.

Clear skies,
Arthur Pinewood


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Andresin150
Pooh-Bah


Reged: 08/14/07

Loc: Bogotá - La Calera / Colombia
Re: Fujinon new [Re: Pinewood]
      #5510049 - 11/08/12 02:18 PM

I think that a wide angle experience relates a lot more with the AFOV and barely with the TFOV.
With that in mind, I wouldnt consider any binocular below 65 deg Afov a wide angle.
If we rely only in TFOV, any system at 2x would be a wide angle even if it feels like looking trough a pipe. And, for example, the Docters at 40x provide an ultra wide 2.2 deg of TFov, which is a lot for 40x....


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oldtimer
Pooh-Bah
*****

Reged: 11/13/08

Loc: Lake County Illinois
Re: Low mag Binocs new [Re: Binojunky]
      #5510253 - 11/08/12 05:00 PM

A strong 2nd for the 6X30 Leupold Yosemites. ADORAMA has them fr $79.95 +. The nice thing about 6X is that one can actually hold them relatively steady without any support.

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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: oldtimer]
      #5510465 - 11/08/12 08:05 PM

Thanks for all the inputs,

I checked the web for all recommended options, I was able to find most of them. Far more options than what I originally thought. These are the options that I believe could give me the results I am looking for:

1. Fijinon 6x30 FMTR-SX is no longer in the market, but can be purchased second hand for about $400.00

2. Kowa YF 6x30 < $100.00

3. Leupold BX 1 Yosemite 6x30 < $100.00

4. Nikon 7x35 Action EX Extreme ABT < $150.00

5. Vortex Raptor 6.5 x 32 < $125.00

6. Vortex Viper 6 x 32 < $275.00

7. Meopta MeoPro 6.5 x 32 < $300.00

I read multiple reviews, mostly (bird watching) and seems like the Vortex Viper, Leupold Yosemite, and the Nikon Action EX are pretty popular and highly ranked.
I also read a couple of reviews noting negative inputs on the Vortex as not being sharp close to the edges. Some people complained about the Leupold Yosemite for not offering good low light performance (cloudy days or sunset), not sure what would that mean for astronomy?

I am not sure if the 7x35 Nikon will do the work (it may go deeper than what I want).
So it leaves me with two popular options, the Vortex Viper 6x32 and the Leupold Yosemite.

Any inputs?

Thank you all for your feedback.

Clear skies!


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Plan9
professor emeritus


Reged: 01/28/08

Loc: Northern VA
Re: Low mag Binocs new [Re: rhophi]
      #5510524 - 11/08/12 08:48 PM

rhophi,

One more link comparing Viper and Yosemite here .

Not sure what you mean about the 7x35 going deeper than you want - could you clarify?

One warning on the Fujinon - if you plan to use it for terrestrial viewing (birds, etc), the individual focus will be difficult to work with.

Bill


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Pinewood
Pooh-Bah


Reged: 12/07/04

Loc: 40.77638º N 73.982652 W
Re: Low mag Binocs new [Re: rhophi]
      #5510533 - 11/08/12 08:51 PM

Quote:

Thanks for all the inputs,

I checked the web for all recommended options,
1. Fijinon 6x30 FMTR-SX is no longer in the market, but can be purchased second hand for about $400.00


Any inputs?

Thank you all for your feedback.

Clear skies!



Hello Rho Phi,

I wrote of the AR-SX Fujinon, not the FMTR-SX. It was rather less expensive than the Viper or Meopta but still more costly than the Yosemite and Kowa, but it seems to be out of production, as well. It sold for about $150, a few years, ago.

There was a thread about them:

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/1,2,3,4,5,8,10/Board/binoculars/Number/2936616/page/188/view/collapsed/sb/5/o/all/fpart/1

Clear skies,
Arthur Pinewood


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Stacy
Star Partyer
*****

Reged: 09/15/02

Loc: Seattle, WA
Re: Low mag Binocs new [Re: Pinewood]
      #5510632 - 11/08/12 09:48 PM

I have been reading up on the Vortex offerings and must say I find the warranty quite entising. Not just defects... But damage as well, no matter where or when you aquire them. Add the many positive reviews and I am thinking of making a purchase myself!

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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: Plan9]
      #5510697 - 11/08/12 10:21 PM

Quote:

rhophi,

One more link comparing Viper and Yosemite here .

Not sure what you mean about the 7x35 going deeper than you want - could you clarify?

One warning on the Fujinon - if you plan to use it for terrestrial viewing (birds, etc), the individual focus will be difficult to work with.

Bill




Bill,

Thanks for the link, it is really interesting and lots of good information to digest.
I am planning to use the binoculars for Astronomy only.
When I said the 7x35 going deeper than what I want, I mean that I am looking for a pair of binocs that I feel like an extension of my eyes, but an enhaced vision (I just want to enhance my vision so I can see 4 and 5 magnitude stars...more than that will be a waste).
If I want to go deeper, I will use my scopes or other binocs that I own.

Clear sklies!


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: Pinewood]
      #5510704 - 11/08/12 10:26 PM

Quote:

Quote:

Thanks for all the inputs,

I checked the web for all recommended options,
1. Fijinon 6x30 FMTR-SX is no longer in the market, but can be purchased second hand for about $400.00


Any inputs?

Thank you all for your feedback.

Clear skies!



Hello Rho Phi,

I wrote of the AR-SX Fujinon, not the FMTR-SX. It was rather less expensive than the Viper or Meopta but still more costly than the Yosemite and Kowa, but it seems to be out of production, as well. It sold for about $150, a few years, ago.

There was a thread about them:

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/1,2,3,4,5,8,10/Board/binoculars/Number/2936616/page/188/view/collapsed/sb/5/o/all/fpart/1

Clear skies,
Arthur Pinewood




Hi Arthur,

I checked the AR-SX as well, but these gems are no longer available.
I located a pair of used Fujinon 6x30 FMTR-SX (these could be an option if the price matches the condition).

Cheers!


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Jae
Pooh-Bah
*****

Reged: 04/13/06

Loc: New England
Re: Low mag Binocs new [Re: Plan9]
      #5510726 - 11/08/12 10:37 PM

Quote:

rhophi,

Have you seen these: Vortex 6x32

(not promoting Eagle, they just have that bin on sale, although my experience with them has been good).

Bill






I recommend these over the Vortex -if you get a good pair, they are better. First was not as good, second was better but not as good as the HD version but close at 1/3 the cost on sale.

http://www.eagleoptics.com/binoculars/eagle-optics/eagle-optics-ranger-srt-6x32-


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ronharper
Carpal Tunnel
*****

Reged: 02/14/06

Re: Low mag Binocs new [Re: Jae]
      #5510760 - 11/08/12 10:53 PM

rho,
Get the FMT, unless the price is very high. They were about $300 new. Sometimes a seller will play the "rarity" game and try cut your throat. But if the condition is good, $250 would not be a bad price.

I had one, and the only thing in the world wrong with is that it was a 6x, which I decided was not enough for me. Excellent quality, mechanical and optical. It will out-bright, out-sharp and out-contrast almost everything that has been mentioned, and at least tie the Zeiss and Swaro.
Ron


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RichD
Carpal Tunnel


Reged: 11/08/07

Loc: Derbyshire, UK
Re: Low mag Binocs new [Re: ronharper]
      #5511123 - 11/09/12 07:38 AM

I agree with Ron, but I think he may be wrong about price. Expect to pay more like 300-350 USD for one of those. You really don't see that many around anymore, rarity game or not. The 8x30 model seems to go for similar money and is excellent also.

Shame they discontinued the AR-SX, they were great little binos. Tough and sharp, like the MT line the only thing they lacked was the awesome outer field sharpness of the FMT line.


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planetmalc
sage


Reged: 10/21/09

Re: Low mag Binocs new [Re: rhophi]
      #5511393 - 11/09/12 10:38 AM

Quote:

Quote:

rhophi,

One more link comparing Viper and Yosemite here .

Not sure what you mean about the 7x35 going deeper than you want - could you clarify?

One warning on the Fujinon - if you plan to use it for terrestrial viewing (birds, etc), the individual focus will be difficult to work with.

Bill




Bill,

Thanks for the link, it is really interesting and lots of good information to digest.
I am planning to use the binoculars for Astronomy only.
When I said the 7x35 going deeper than what I want, I mean that I am looking for a pair of binocs that I feel like an extension of my eyes, but an enhaced vision (I just want to enhance my vision so I can see 4 and 5 magnitude stars...more than that will be a waste).
If I want to go deeper, I will use my scopes or other binocs that I own.

Clear sklies!



In that case, buy ANYTHING with a wide true field-of-view and just stop the objectives down until the instrument doesn't go deeper than mag 5 under your skies.

If this was MY project, and I wanted an instrument that I didn't have to stop down in order to limit it to mag 5, then I think I'd try to get hold of a pair of the Russian 2.3 x 40 wide-angle Galileans with their 28-degree (max) TFOV.


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Aleko
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Re: Low mag Binocs new [Re: planetmalc]
      #5512071 - 11/09/12 06:00 PM

Has anyone recommended 2.3x40 opera glasses yet? Can't remember where I got mine a few years ago. I can get entire constellations in the field of view, and see stars a couple of mags dimmer than what I normally see in my light polluted suburban skies. IIRC they cost ~$100. For "normal" astronomy I use 7x50s or image stabilized binocs, but for what the OP is wanting do do, these Chinese made opera glasses may be ideal.

Alex

EDIT: Sorry, don't know how I missed the previous post!

Edited by Aleko (11/09/12 06:06 PM)


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rhophi
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Re: Low mag Binocs new [Re: Jae]
      #5512213 - 11/09/12 07:37 PM

Quote:

Quote:

rhophi,

Have you seen these: Vortex 6x32

(not promoting Eagle, they just have that bin on sale, although my experience with them has been good).

Bill






I recommend these over the Vortex -if you get a good pair, they are better. First was not as good, second was better but not as good as the HD version but close at 1/3 the cost on sale.

http://www.eagleoptics.com/binoculars/eagle-optics/eagle-optics-ranger-srt-6x32-




Hi Jae,

The Eagle Optics Ranger SRT 6x32 binocs @ $180 have great reviews, these will be seriously considered...I will read more over the weekend.

Thanks for the lead!

Clear skies!


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rhophi
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Re: Low mag Binocs new [Re: RichD]
      #5512230 - 11/09/12 07:49 PM

Quote:

I agree with Ron, but I think he may be wrong about price. Expect to pay more like 300-350 USD for one of those. You really don't see that many around anymore, rarity game or not. The 8x30 model seems to go for similar money and is excellent also.

Shame they discontinued the AR-SX, they were great little binos. Tough and sharp, like the MT line the only thing they lacked was the awesome outer field sharpness of the FMT line.




Ron/Doug,

The Fujinon 6x30 FMTR-SX that I located are selling for $350. I do not know the condition, still wating for more information from the owner.
Fujinon are known to be excellent performers and this model is porro prism design, that based on what I have read are preferred for Astronomy. I have little to no experience with roof prism binocs, so for me it will be a new experience.

Cheers!


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Plan9
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Re: Low mag Binocs new [Re: Aleko]
      #5512238 - 11/09/12 07:55 PM

Quote:

I am looking for a pair of binocs that I feel like an extension of my eyes, but an enhaced vision (I just want to enhance my vision so I can see 4 and 5 magnitude stars...more than that will be a waste).




Actually, given this statement, I think the previous two posters are on to something. Opera glasses would give you low mag and very wide field (not quite sure about the latter). That would be what you need for the experience of "hyper vision". Even 6x binoculars are going to give you a binocular experience. You don't seem to be concerned about large aperture or optimum transmission.

When I google opera glasses, I find Zhumell, Barska, and Eschenbach show up - all "known" optics manufactures and the glasses range from $30 to $250. Nobody gives any specs so who knows what's good or what the FOV is. For all I know, the $250 glasses are the same but look cooler. Don't know if any of these are tolerable for CA, field flatness, or distortion.

Now I'm curious.

Bill


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rhophi
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Re: Low mag Binocs new [Re: Aleko]
      #5512239 - 11/09/12 07:55 PM

Quote:

Has anyone recommended 2.3x40 opera glasses yet? Can't remember where I got mine a few years ago. I can get entire constellations in the field of view, and see stars a couple of mags dimmer than what I normally see in my light polluted suburban skies. IIRC they cost ~$100. For "normal" astronomy I use 7x50s or image stabilized binocs, but for what the OP is wanting do do, these Chinese made opera glasses may be ideal.

Alex

EDIT: Sorry, don't know how I missed the previous post!




Hi Planetmalc/Aleko,

I read a review here in Cloudy Nights about this model. It was posted back in 2008 about the Owl Eyes: 2.3x40 Russian Binoculars.
The concept and the numbers look perfect for my project, but I had no luck in locating them.

Clear skies!


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Joad
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Re: Low mag Binocs new [Re: rhophi]
      #5512252 - 11/09/12 08:13 PM

The Miyauchi 5X32 Binon might fit the bill, but, alas, it has long since been discontinued.

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BillC
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Re: Low mag Binocs new [Re: RichD]
      #5512297 - 11/09/12 08:52 PM Attachment (32 downloads)

Quote:

I agree with Ron, but I think he may be wrong about price. Expect to pay more like 300-350 USD for one of those. You really don't see that many around anymore, rarity game or not. The 8x30 model seems to go for similar money and is excellent also.

Shame they discontinued the AR-SX, they were great little binos. Tough and sharp, like the MT line the only thing they lacked was the awesome outer field sharpness of the FMT line.




Hi Rich:

Fujinon may not be selling the AR to the American public, but it is still around. It is the current US Army’s M22; it was the Swift Seahawk; former Simmons 1170, etc.

The one Swift sold, right before the company sold out, is in the middle of the photo—between the FMTRC-SX and the Steiner Admiral. Note the improved oculars ala Carton’s “Adlerblick Fernglasser” (How’s that for a name to make people THINK it’s German?)

I always got MY shipments from Kama Tech (kamakura on US soil) though each time I say that, Gordon pipes up to say they’re made by Katsuma.

I REALLY DON’T KNOW OR CARE!

I just know I got all MY parts from Kama Tech and whenever there was a warranty issue, Fujinon would have me send it to Kama Tech.

Thus, I don’t have a dog in this race; I’m just giving you something to think about.

Cheers,

BillC


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faackanders2
Carpal Tunnel


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Re: Low mag Binocs new [Re: rhophi]
      #5512361 - 11/09/12 09:48 PM

How low do you want to go?

Kasai goes as low as 2.3x40mm and 28 deg TFOV but almost zero eye relief (must be used w/o glasses). For these I have bought a hands free headset that makes me look like "owl man" but havn't used the head set for meteor showers yet. I would not recommend these as your first bino though since they are only 2.3x, but they are great for what they do and the sky looks like the sky charts and it makes you feel like you have binonic eyes.

I also have a 7x32mm UW 14 deg TFOV; an 8x40 UW 9.4 deg TFOV 5mm exit pupil, and Vixen 10x50 SW 8.5 deg TFOV 5mm exit pupil 7m eye relief.

One advantage of wide binos you can use them for sports, music, panoramics, and kids events too!


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Binojunky
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Re: Low mag Binocs new [Re: faackanders2]
      #5512379 - 11/09/12 10:07 PM

I have a pair of Russian 4x36 Galileon style glasses, made in the USSR,came in a nice leather case, all metal construction with lovely coatings, picked then up NOS a few years back for about $25, the booklet says"Opera Glass", 8 degree FOV, made in 1989, to be honest I have never used them on the night sky however I will at the first chance,DA.

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faackanders2
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Re: Low mag Binocs new [Re: Binojunky]
      #5512430 - 11/09/12 11:01 PM

Quote:

I have a pair of Russian 4x36 Galileon style glasses, made in the USSR,came in a nice leather case, all metal construction with lovely coatings, picked then up NOS a few years back for about $25, the booklet says"Opera Glass", 8 degree FOV, made in 1989, to be honest I have never used them on the night sky however I will at the first chance,DA.




I wonder if these are similar design, or same manufacturer as the original russian 2.3x40mm?


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faackanders2
Carpal Tunnel


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Re: Low mag Binocs new [Re: faackanders2]
      #5512485 - 11/09/12 11:39 PM

Quote:

Quote:

I have a pair of Russian 4x36 Galileon style glasses, made in the USSR,came in a nice leather case, all metal construction with lovely coatings, picked then up NOS a few years back for about $25, the booklet says"Opera Glass", 8 degree FOV, made in 1989, to be honest I have never used them on the night sky however I will at the first chance,DA.




I wonder if these are similar design, or same manufacturer as the original russian 2.3x40mm?




No, looked totally different, and greatly narrower AFOV and TFOV.


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Jae
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Re: Low mag Binocs new [Re: rhophi]
      #5512527 - 11/10/12 12:16 AM

Quote:

Quote:

Quote:

rhophi,

Have you seen these: Vortex 6x32

(not promoting Eagle, they just have that bin on sale, although my experience with them has been good).

Bill






I recommend these over the Vortex -if you get a good pair, they are better. First was not as good, second was better but not as good as the HD version but close at 1/3 the cost on sale.

http://www.eagleoptics.com/binoculars/eagle-optics/eagle-optics-ranger-srt-6x32-




Hi Jae,

The Eagle Optics Ranger SRT 6x32 binocs @ $180 have great reviews, these will be seriously considered...I will read more over the weekend.

Thanks for the lead!

Clear skies!




Yep, I won these from Eagle Optics but after carefully looking at left and right side, I found the right side sharper so I returned them for another pair then the ranking switched where these were right between the Viper and the Viper HD. You can see my review of the HD 6x32 at the site.

I still think the Viper 6x32s are excellent and enjoy using them over at my mothers (gave them to her).

I'm spoiled by Swarovision but Rangers are so good you wonder why anyone would spend the $ for anything more. Also eagle optics service is amazing.


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Mark9473
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Re: Low mag Binocs new [Re: Jae]
      #5512680 - 11/10/12 04:55 AM

The Viper 6x32 still have only 8° TFOV - what's the point in that, if there are 7x35 and 8x40 having a wider TFOV?

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Grimnir
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Re: Low mag Binocs new [Re: Mark9473]
      #5512725 - 11/10/12 06:11 AM

I'm surprised no-one has mentioned the Bushnell Xtra-Wide 4x30.

I have no experience of them so I have no idea whether they are good (within their obvious limitations) or bad.

For quality wide field views the Nikon EII 8x30 should be considered.


Graham


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Jae
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Re: Low mag Binocs new [Re: Mark9473]
      #5512762 - 11/10/12 07:30 AM

Quote:

The Viper 6x32 still have only 8° TFOV - what's the point in that, if there are 7x35 and 8x40 having a wider TFOV?




Excellent point, I agree. The only offset is they are so easy to hold steady, very easy on the eyes.

But I do love wide field of view as well ....but which 6x bino has a 60-70 afov and why don't they make them? Maybe same reason why 7x50's porros are less often found with a wide field?


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planetmalc
sage


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Re: Low mag Binocs new [Re: Grimnir]
      #5512881 - 11/10/12 09:45 AM

Quote:

I'm surprised no-one has mentioned the Bushnell Xtra-Wide 4x30.

I have no experience of them so I have no idea whether they are good (within their obvious limitations) or bad.

Graham



I tried a pair in a shop and liked what I saw, but they're fixed-focus and that would be a problem if the OP is short-sighted.


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Gordon Rayner
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Re: Low mag Binocs new [Re: BillC]
      #5513440 - 11/10/12 04:49 PM

The above statement about Kamakura and Katsuma:

The one in the picture is a Kamakura. I was at a meeting before the M-22 contract was finalized. Lots of government paperwork which often had little to do with product quality.

Earlier, the Tasco 8 x 30 and 7 x 50 sold to USMC ( I have dozens with cracked glue from Camp Pendleton) , and some to the Navy, as well as ( one model of ) the Swift commercial 7 x 50 , were Katsuma.

The very wide angle Bushnell 4X uses at least some mirrors, instead of prisms , seemed to have a bluish tint in the specimens I saw, and was a Kamakura product.


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Bcpaq
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Re: Low mag Binocs new [Re: Gordon Rayner]
      #5513511 - 11/10/12 06:19 PM

I love my Yosemite 6x30s.

For the price you can't go wrong. If you have the big bucks, then go for the high end binocs, but if you are on a budget these Leupolds are great.


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BillC
on a new path
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Re: Low mag Binocs new [Re: Bcpaq]
      #5513734 - 11/10/12 09:50 PM

"I was at a meeting before the M-22 contract was finalized."

In what capacity were you in at that meeting?

Cheers,

Bill


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Aleko
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Re: Low mag Binocs new [Re: BillC]
      #5514349 - 11/11/12 11:57 AM

Back to opera glasses...

This thread inspired me to take mine along on an observing run last night. These 2.3x40's are listed as 28 degree field. I measured the field to be closer to 19 degrees, which was still wide enough to take in all of Orion or Gemini. I was at a dark site, and Orion especially was filled with stars. Very cool capturing the entire constellation in one view.

I found one place that lists what I have, but they may be a wholesaler. Nonetheless, perhaps they can lead to you someone who sells them...

United Optics

Alex


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rhophi
member


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Re: Low mag Binocs new [Re: Jae]
      #5515315 - 11/11/12 11:53 PM

Quote:

Quote:

The Viper 6x32 still have only 8° TFOV - what's the point in that, if there are 7x35 and 8x40 having a wider TFOV?




Excellent point, I agree. The only offset is they are so easy to hold steady, very easy on the eyes.

But I do love wide field of view as well ....but which 6x bino has a 60-70 afov and why don't they make them? Maybe same reason why 7x50's porros are less often found with a wide field?




Since the night sky has been very clear in Northern Cal lately. Yesterday I took the 10x50 UltraView to check a couple of red stars (Mu Cephei and 19 TX Piscium) the latter lies just south of the Great Square of Pegasus and to the east of the Pisces Circlet. While observing this beautiful carbon star I switched to the Circlet to see if I could watch the whole Circlet, but only 70% of the Circlet fit in the FOV.

The 10x50 UltraView AFOV = 6.5 Deg.

This intrigued me and this morning I quickly searched for the AFOV of the various candidate binocs and this is what I found:

7x35 Nikon Action Extreme AFOV = 9.3 Deg
7x50 Nikon Action Extreme AFOV = 6.2 Deg (I guess this one delivers brighter views)
6x32 Vortex Viper AFOV = 8 deg
I was not able to find the AFOV for Eagle Optics Ranger SRT 6x32
The 7x35 Nikon and 6x32 Viper look promising for the task.


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rhophi
member


Reged: 10/22/11

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Re: Low mag Binocs new [Re: Aleko]
      #5515373 - 11/12/12 12:36 AM

Quote:

Back to opera glasses...

This thread inspired me to take mine along on an observing run last night. These 2.3x40's are listed as 28 degree field. I measured the field to be closer to 19 degrees, which was still wide enough to take in all of Orion or Gemini. I was at a dark site, and Orion especially was filled with stars. Very cool capturing the entire constellation in one view.

I found one place that lists what I have, but they may be a wholesaler. Nonetheless, perhaps they can lead to you someone who sells them...

United Optics

Alex




Alex,

Thanks for sharing the experience, seems like these 2.3x40 with 28 Deg FOV give space walk effect.
These opera glasses are really interesting, but Kunming Unted Optics is a manufacturer in China, I have not been able to find a retailer to purchase direct.

Cheers!


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Pinewood
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Reged: 12/07/04

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Re: Low mag Binocs new [Re: rhophi]
      #5516739 - 11/12/12 08:58 PM

Quote:


I was not able to find the AFOV for Eagle Optics Ranger SRT 6x32





Hello RhoPhi,

From a 409 foot field of view, I calculate 7.76º TFOV or 46.5º apparent field of view.

Clear skies,
Arthur Pinewood

Edited by Pinewood (11/12/12 09:00 PM)


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: Pinewood]
      #5517838 - 11/13/12 12:32 PM

Hi Arthur,

Thanks for the info.

Clear skies!


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rhophi
member


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Re: Low mag Binocs new [Re: rhophi]
      #5517848 - 11/13/12 12:36 PM

After reading your comments and multiple reviews in the web.

I decided to go with the Eagle Optics Ranger SRT 6x32.

I just ordered them from Eagle Optics.

I will provide an update as soon as I receive them and the winter skies give me a chance.

Clear skies!


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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Low mag Binocs new [Re: rhophi]
      #5528747 - 11/19/12 08:33 PM

Quote:

Quote:

Back to opera glasses...

This thread inspired me to take mine along on an observing run last night. These 2.3x40's are listed as 28 degree field. I measured the field to be closer to 19 degrees, which was still wide enough to take in all of Orion or Gemini. I was at a dark site, and Orion especially was filled with stars. Very cool capturing the entire constellation in one view.

I found one place that lists what I have, but they may be a wholesaler. Nonetheless, perhaps they can lead to you someone who sells them...

United Optics

Alex




Alex,

Thanks for sharing the experience, seems like these 2.3x40 with 28 Deg FOV give space walk effect.
These opera glasses are really interesting, but Kunming Unted Optics is a manufacturer in China, I have not been able to find a retailer to purchase direct.

Cheers!




Kasai in Japan sells them, and has a link to the hands free headset and 48mm filter holders. The hands free headset is worth it, if you don't mind loking like owl-man


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: faackanders2]
      #5534528 - 11/22/12 09:56 PM

Hifaackanders2,

Thanks for the link, the page is completely in Japanese, quite challenging...

I just tried the Rangers last night.
I will post my experince later.

Clear skies!


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: rhophi]
      #5534778 - 11/23/12 02:29 AM

I received the Ranger SRT 6x32mm binoculars about a week ago 11/17 when a couple of low pressure systems (cold fronts) were sweeping across the Northwest coast, bringing clouds and rain to Northern California.
During this time, I checked for craftsmanship and optical coating.
The Eagle Optics SRT 6x32 Roof Prism binocs are sturdy and properly assembled (no moving parts). The rubber armoring set weights 550 gr (19.4 oz); very compact (124.5 mm height and 122 mm width).
I was able to set the Ranger very comfortably on my eyes. With an eye relief of 19.5mm, it felt like a perfect fit for my eyes (comfort is far superior to all my Porro prism design sets). Every time I switched to my 10x50 Orion UltraView, it felt very awkward on my eyes. The Ranger SRT is a very comfortable set to observe with. A negative tone is that I found the diopter ring to be tight and hard to turn.
I compare the coatings of the Ranger SRT to the other three sets I own. Per printed specifications, they are all assembled with multicoated optical surfaces. However the test suggested that this was not true for one of the binoculars. The results confirmed my doubts about my 15x70 Celestron SkyMaster set.
I held each set of binoculars under a bright light with the following results:
• The SRT 6x32 lenses showed a deep purple sheen. When tilted back and forth the light reflection was dim and purple. This suggests proper multicoated lenses.
• Next to the SRT, I placed the 10x50 Orion which showed a very deep green coating with dim reflections. In my opinion, the Orion has the best coating of all the sets.
• The Celestron 15x70 SkyMaster gave off a pale green color coating and perceptible bright white light reflections which suggests single-layer coating.
• The Oberwerk 20x80 showed a green coating, quite uniform, but the white light reflections were whiter and brighter than the ones observed on the Orion and the Ranger, but far less than the Celestron’s.

Under the sky…Last night the clouds finally gave us a break and the Northern and Eastern portion of the sky cleared up and I was able to point at Cassiopeia and Perseus. The double cluster which looks spectacular on the 10x50 Orion, appeared very dim on the SRT. Then I turned over to Taurus to check the Hyades which spans about 6 degrees of sky. The Ranger SRT 6x32 captured the whole cluster from Gamma tauri to Aldebaran, and to epsilon tauri. Even though the view captured the whole cluster, the view was dim and FOV seemed like looking through two toilet paper roll cardboard core tubes.
To my surprise the stars look sharp all the way to the edge.

The crescent moon was out and pointed the SRT Ranger at to look for any false color on the limb of the moon. The view of the moon was sharp with good contrast, and even though there was a very slight purple color, it did not bother me.

In the morning, I looked for birds in the backyard, and I was impressed by the sharp, clear and vivid colors of the bird’s feathers and eyes.
The SRT Ranger 6x32 seem to do a fantastic job in the daylight (birding), but the set did not created the wow effect I was looking for on dim stars and constellations.

Conclusion, I believe I need a little bit more of aperture (objective lenses) and a slightly more magnification.

I decided to return the Ranger SRT 6x32 and look for a wide FOV 7x35 or 8x42.

Eagle Optics carries a 8X42 – Atlas Optics Intrepid ED with 8.01 Degrees FOV which seem to be a good option.

Clear night skies!


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Mark9473
Postmaster
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Reged: 07/21/05

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Re: Low mag Binocs new [Re: rhophi]
      #5534850 - 11/23/12 04:09 AM

Nice report; I think you confirmed our expectations with regard to light grasp and particularly the narrow AFOV. It's good to know that otherwise they're a nice set of optics.

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Pinewood
Pooh-Bah


Reged: 12/07/04

Loc: 40.77638º N 73.982652 W
Spiking new [Re: Mark9473]
      #5534987 - 11/23/12 08:13 AM

Hello Rho Phi,

Did you look at any planets, to check for "spiking?" This is the bane of most roof prism binoculars. The top of the line roof prism binoculars, like the Zeiss Victory line or the Leica binoculars, do minimize the problem, but it is not present in Porro glasses.

Clear skies,
Arthur


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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Low mag Binocs new [Re: rhophi]
      #5535665 - 11/23/12 02:47 PM

Quote:

Hifaackanders2,

Thanks for the link, the page is completely in Japanese, quite challenging...

I just tried the Rangers last night.
I will post my experince later.

Clear skies!




Yes, They are Japanese. You can translate Japanese to Englisg but the translation is not that great.

There are other 2.3x40mm galilean binocular articles (from ewhen they were made in Russia, same design but coatings may be different.)

I bought mine from Blue Planet Optics, and then bought the headset and 48mm filter holders fron Kasai and one of their partner suppliers. I wrote them a letter or e-mail in enlish, and they replied back in english on the US price (actually I think it may have ben paypal or credit card in yen and/or the3y converted it for me in dollars).

I really like the ultra wide view, but eye relief is near zero, and the closer you get to your eye the wider the views. I like the hands free headset since extended viewing like meteor showers doesn't requie keepings arms up, but the wide view is reduced slightly since they are not as close to the eyes as hand holding them, and the bino mount/bracket could have been made easier and more robust with a bottom flange to resist sliding/falling out.

Af so the filter holders. I have 2 skyglow, 1 ultrablock, 1 OIII, and 1 hydrogen beta filter. I either prefer no filters, or one skyglow and one non filter. I have seen M42, M8, M27 (as blinking planetary) and NGC7000 with filters; and obviosly M42, M48, M31 and others w/o filters (and looks like skychart!).


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rhophi
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Reged: 10/22/11

Loc: Bay Area, CA
Re: Spiking new [Re: Pinewood]
      #5535831 - 11/23/12 04:28 PM

Quote:

Hello Rho Phi,

Did you look at any planets, to check for "spiking?" This is the bane of most roof prism binoculars. The top of the line roof prism binoculars, like the Zeiss Victory line or the Leica binoculars, do minimize the problem, but it is not present in Porro glasses.

Clear skies,
Arthur




Hi Arthur,

I pointed at Jupiter for a moment, but the view was not eye catching. So I quickly moved to another part of the sky.

How do you describe "spiking" ?


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Mark9473
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Re: Spiking new [Re: rhophi]
      #5536016 - 11/23/12 06:32 PM

What Arthur meant is that roof prism binoculars can show a single large diffraction line that bisects the image diagonally. I wouldn't actually call that "spiking", but I believe this is what he meant. It is best seen when looking at a nearby streetlight. In my Vixen 8x42 I found it invisible on anything fainter than the Moon.

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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Spiking new [Re: Mark9473]
      #5537424 - 11/24/12 03:48 PM

Quote:

What Arthur meant is that roof prism binoculars can show a single large diffraction line that bisects the image diagonally. I wouldn't actually call that "spiking", but I believe this is what he meant. It is best seen when looking at a nearby streetlight. In my Vixen 8x42 I found it invisible on anything fainter than the Moon.




I just took a quick glance at Jupiter, but I do not recall seeing what you have described.

Thanks for clarifying the point.

Clear Skies


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Low mag Binocs new [Re: faackanders2]
      #5537457 - 11/24/12 04:09 PM

Quote:

Quote:

Hifaackanders2,

Thanks for the link, the page is completely in Japanese, quite challenging...

I just tried the Rangers last night.
I will post my experince later.

Clear skies!




Yes, They are Japanese. You can translate Japanese to Englisg but the translation is not that great.

There are other 2.3x40mm galilean binocular articles (from ewhen they were made in Russia, same design but coatings may be different.)

I bought mine from Blue Planet Optics, and then bought the headset and 48mm filter holders fron Kasai and one of their partner suppliers. I wrote them a letter or e-mail in enlish, and they replied back in english on the US price (actually I think it may have ben paypal or credit card in yen and/or the3y converted it for me in dollars).

I really like the ultra wide view, but eye relief is near zero, and the closer you get to your eye the wider the views. I like the hands free headset since extended viewing like meteor showers doesn't requie keepings arms up, but the wide view is reduced slightly since they are not as close to the eyes as hand holding them, and the bino mount/bracket could have been made easier and more robust with a bottom flange to resist sliding/falling out.

Af so the filter holders. I have 2 skyglow, 1 ultrablock, 1 OIII, and 1 hydrogen beta filter. I either prefer no filters, or one skyglow and one non filter. I have seen M42, M8, M27 (as blinking planetary) and NGC7000 with filters; and obviosly M42, M48, M31 and others w/o filters (and looks like skychart!).




I will check to see if there is a dealer that carries WideBino 28 opera glasses overseas i.e. Australia that I visit at least twice a year. Or maybe somewhere in South America.
For my taste, Kasai Trading is not set to make business with foreign countries.

Thanks for the info!


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GlennLeDrew
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Re: Low mag Binocs new [Re: rhophi]
      #5537656 - 11/24/12 06:35 PM

On my Russian version of the 2.3X40 I improved eye relief/FOV concerns by removing the rear part of the eyepiece which has the hole to peer through. This ring also retains the eyepiece barrel's outer sleeve, and to keep this from falling off I placed some bits of tape under the sleeve so that it is held on by friction. This modification makes seeing the fullest field rather easier. Like any Galilean instrument, which does not have a field stop, the FOV depends on eye placement, as well as on objective diameter (at 2.3X, the largest portion of the objective contributing to image formation would be less than 20mm.)

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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Low mag Binocs new [Re: rhophi]
      #5537659 - 11/24/12 06:38 PM

Writing an email to Kasai may be quicker than waiting for some company (like Blue Planet Optics) to market them in english.

They did respond back to me quickly in english.

The only thing though price is dependent on the Yen/dollar rate which you may want to wait if you are optimistic the dollar will do better in the future (providing the US dollar doesn't fall off the cliff).


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Pinewood
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Reged: 12/07/04

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Re: Spiking new [Re: rhophi]
      #5538107 - 11/25/12 12:33 AM

Quote:



Hi Arthur,

I pointed at Jupiter for a moment, but the view was not eye catching. So I quickly moved to another part of the sky.

How do you describe "spiking" ?




Hello Rho Phi,

Holger Merlitz wrote:
As a result of diffraction at the roof edge, a bright point-like source is producing a single "spike", and since both prisms (left and right tube) are oriented under different angles, both spikes form a cross-like structure when the light source is of sufficient intensity. The intensity of these spikes may be related to the accuracy to which the roof edge is cut, and hence it differs from instrument to instrument. -
http://www.holgermerlitz.de/meopta8x32.html

Clear skies,
Arthur


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rhophi
member


Reged: 10/22/11

Loc: Bay Area, CA
Re: Spiking new [Re: Pinewood]
      #5540799 - 11/26/12 06:46 PM

Quote:

Quote:



Hi Arthur,

I pointed at Jupiter for a moment, but the view was not eye catching. So I quickly moved to another part of the sky.

How do you describe "spiking" ?




Hello Rho Phi,

Holger Merlitz wrote:
As a result of diffraction at the roof edge, a bright point-like source is producing a single "spike", and since both prisms (left and right tube) are oriented under different angles, both spikes form a cross-like structure when the light source is of sufficient intensity. The intensity of these spikes may be related to the accuracy to which the roof edge is cut, and hence it differs from instrument to instrument. -
http://www.holgermerlitz.de/meopta8x32.html

Clear skies,
Arthur




Hi Arthur,

I have seen ghost images as described in Holger Merlitz's report. These are noticeable inside some eyepieces when observing the moon or bright objects like Venus or Jupiter.
I believe, ghost images are mainly caused by internal reflections inside the eyepiece.
In regards to the Ranger SRT 6x32, I remember I observed the moon for several minutes and I do not recall seeing any ghost images.

I will check again as soon as I receive the 8x42 Atlas Optics Intrepid ED Roof Binocular.

Clear Skies!


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