Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Classic Telescopes

Pages: 1 | 2 | 3 | 4 | (show all)
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Manufactures of good long focaL length refractors
      #5652757 - 01/30/13 04:51 PM

Are there any makers of decent long focal ratio refractors left? If so, who? What would you suggest?

Thank
Bart


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mirzam
Post Laureate
*****

Reged: 04/01/08

Loc: Lovettsville, VA
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5652789 - 01/30/13 05:08 PM

Surely you have heard of this:

D&G

I have a 5" f/12 and it's quite excellent. Took over a year to arrive though.

JimC


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: Mirzam]
      #5652800 - 01/30/13 05:13 PM

I have even seen a 5" F12 triplet

http://www.cloudynights.com/classifieds/showproduct.php?product=73444&sor...

then there is ISTAR who makes long focus achromats.

Trying searching on Google. You would be amazed what you can find

Edited by starman876 (01/30/13 05:15 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5652805 - 01/30/13 05:15 PM

These are definitely beauties. The maker is a member of the refractors forum. You can check the buzz on them over there.

http://skylight.myshopify.com/


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5652944 - 01/30/13 06:21 PM

Very nice. But, all are out of my price range. I forgot to include "reasonably priced" in my question....

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5652996 - 01/30/13 06:47 PM

You buy a reasonably priced telescope you get optics that are reasonably good.

I suggest you try the Surplus Shed and buy a Jeagers 4" F15 lens for $100 and then get some tubing and focuser and get crafty. Otherwise, you will just have to go without.

Sorry, but it is the sad truth. Well, unless you get lucky on Craiglsist and find a great deal.

Edited by starman876 (01/30/13 07:04 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5653205 - 01/30/13 09:00 PM

I got to know Richard 2 years ago at Neaf. He brought two refractors with him. He sold one, took orders, and had to move the other before he went back to England. I could kick myself now. I think he finally got $695.

Post Extras: Print Post   Remind Me!   Notify Moderator  
mikey cee
Postmaster
*****

Reged: 01/18/07

Loc: bellevue ne.
Re: Manufactures of good long focaL length refractors new [Re: turk123]
      #5653338 - 01/30/13 10:25 PM Attachment (25 downloads)

ISTAR ISTAR ISTAR ISTAR ISTAR ISTAR ISTAR ISTAR ISTAR You can have any stock or custom made lens placed into an OTA then you can tour the solar system and beyond in style! Mike

Edited by mikey cee (01/30/13 10:35 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5653392 - 01/30/13 10:57 PM

Johann, I just bought one of the remaining Jaegers 4 inch f15 lenses two weeks ago. It got a premium and not a second and it was priced at 150 bucks, but with the sale of 30 percent off I did get it for ~100. Thet were going fast though and I just checked the Shed a few minutes ago and no more 4 inches were for sale, not even seconds.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
ryanr256
super member
*****

Reged: 04/21/09

Loc: Southwest Ohio
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5653409 - 01/30/13 11:16 PM

Quote:

Johann, this is 2013, the piece has gone up. I just bought one of the remaining Jaegers 4 inch f15 lenses two weeks ago. It was a premium and not a second and it was 150 bucks, sale price with 30 percent off. Regular price is ~225 and they are going fast.

Terra




That's interesing Terra. I ordered the 103mm Jaegers objective, SKU L10607J, from Surplus Shed on Friday 1/25. My price was $149 and I had a code for 30% off.

I look now and that SKU is unavailable. I've not received any notification of it not being available, but I've also not received a shipping notification.

My goal is to make my own F/15 refractor.

-Bob


Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Manufactures of good long focaL length refractors new [Re: ryanr256]
      #5653465 - 01/31/13 12:19 AM

The 103mm F15's seem to be very good as a lot, never heard any complaints and I have two good ones. I did have trouble witha couple of 82mm lenses. Fred did exchange them.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Re: Manufactures of good long focaL length refractors new [Re: bremms]
      #5653919 - 01/31/13 09:37 AM

I'm a total newb in the world of DIY long F/ refractors. Is there a 101 website that you'd recommend to someone that want's to build their own? Are good lenses no longer available? Where does one get a good lens? Sorry for my simple questions.....

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5653958 - 01/31/13 09:56 AM

You can find lots of good information in the Refractors forum and also the DIY/ATM forum. Be forewarned though, a lot of the folks over in Refractors are into modern short focal length ed apos, but there are some of us long tube achro freaks there too.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5653973 - 01/31/13 10:03 AM

I have a short focal length scope and I've very happy with it. I'm simply at the point of wanting to have a long focal length achromat to see what that's like. And if I can make one for relatively little money, so much the better.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mirzam
Post Laureate
*****

Reged: 04/01/08

Loc: Lovettsville, VA
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5654527 - 01/31/13 03:22 PM

If you purchase a lens-in-cell (e.g. I-Star, D&G, or sometimes Surplus Shed) then you mainly need a focuser. These are nice:

Crawford Machine

Then if you can build a long, square box, or get a piece of metal tubing that fits the focuser and lens cell, you are set to go. (Still need a huge mount of course).

Do some searches in the ATM forum and you will find a lot of options.

JimC


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: Mirzam]
      #5654691 - 01/31/13 05:01 PM

if you want cheap

here you go

found through google

http://handsonoptics.com/index.php?main_page=product_info&cPath=14_15&...


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5654698 - 01/31/13 05:05 PM

and here once again found through google

http://www.antaresoptical.com/vixen-spec.htm

I think you can handle it from here.

also we are going to get slammed soon for being out of context for not talking about classic telescopes.


Post Extras: Print Post   Remind Me!   Notify Moderator  
neotesla
Pooh-Bah
*****

Reged: 11/18/10

Loc: Canada
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5654947 - 01/31/13 07:44 PM

The f10 and f13 Antares are discontinued. The f15 was well discussed on CN at one time as well, and those have been unavailable for even longer.

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: neotesla]
      #5655004 - 01/31/13 08:24 PM

darn

Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5655048 - 01/31/13 08:49 PM

Not too many choices. The 103mm SS lenses seem to be gone now. Still some 82mm F15's left, the replacement 83 that Fred sent is really superb. Finally got a good 45 minutes of nice clear sky a little while ago. The 103mm F15 Jaegers is really good. GRS was clearly visible along with lots of festoons.

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: bremms]
      #5655069 - 01/31/13 08:58 PM

I remember that Hands on Optics were selling some Vixen Spec lenses

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: bremms]
      #5655093 - 01/31/13 09:13 PM

http://www.khanscope.com/productdetails.cfm?productID=1969

looks like antares is still available outside the USA


Post Extras: Print Post   Remind Me!   Notify Moderator  
Joe Cepleur
Carpal Tunnel


Reged: 03/18/10

Loc: Dark North Woods
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5655308 - 01/31/13 11:27 PM

Quote:

we are going to get slammed soon for being out of context for not talking about classic telescopes.




Maybe not. You're lamenting the lack of new scopes built to classic standards, and trying to find a solution. The fact is that not everyone can find or afford a 4" Unitron, but many of us aspire at least to the optically equivalent experience.

Long-focus scopes are way under-appreciated. Their views are prettier at lower cost, they hold focus better in compromised air, and they are happy with simple, inexpensive eyepieces. If you can find a modern solution to the problem of the world's limited supply of classics, more power to you. "Classic" as a set of optics and a state of mind is valuable in itself, even if the scope is new and the label won't read "Nippon Kogaku."

Cost is a legitimate concern. Skylight Telescopes are perfect, but beyond many budgets. S&T published a glowing review of that scope from Hands-On Optics, emphasizing that the price was not a misprint.

This is, incidentally, why I jumped at the chance to buy my Tasco 7TE-5 recently. I understand that 60mm of aperture won't show me everything I could possibly want to see, yet I anticipate that what it reveals will be shown with exquisite beauty.


Post Extras: Print Post   Remind Me!   Notify Moderator  
neotesla
Pooh-Bah
*****

Reged: 11/18/10

Loc: Canada
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5655767 - 02/01/13 08:23 AM

Quote:

http://www.khanscope.com/productdetails.cfm?productID=1969

looks like antares is still available outside the USA




Khanscope does not have the best reputation... Check out the message on the Skylight telescope site for an example.

http://skylight.myshopify.com/

As well I contacted them about a year ago about these and they had no stock if I remember.


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5656005 - 02/01/13 10:16 AM Attachment (35 downloads)

There you go. I love my AT 102. It's a great scope, optically and mechanically. At F11 it definitely has the look and feel of a classic and performs like one too, with the exception of modern features like the dual speed 2 inch focuser. So at the risk of having this post pulled for being off topic, here's a picture.

Post Extras: Print Post   Remind Me!   Notify Moderator  
nightfisher
super member


Reged: 11/06/11

Loc: Huddersfield UK
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5656663 - 02/01/13 04:13 PM

Just a word of warning regards long focal length fracs, i have an Antares 105 f15 and it is hard on mounts, as a result i dont plan on keeping it, and cant find a buyer for it here in the UK, seems every one wants shorter apo`s

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pete-LH
sage
*****

Reged: 03/25/09

Loc: Wilmington, DE
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5656850 - 02/01/13 05:49 PM Attachment (25 downloads)

Actually the D&G 5" f/12 or f/15 price is not so unreasonable ... but the wait is long.
Another route for 4" is to buy a Carton 100mm f/13 lens from S. Favorski and have a refractor constructed by Dan Crawford(same as the maker of the Crawford focuser mentioned above). He does very good work at a reasonable price and is pretty good with respect to timing as well.

http://www.cloudynights.com/ubbthreads/showflat.php?Cat=&Board=classics&a...,,All_Forums,,&Words=&Searchpage=1&Limit=25&Main=5489833&Search=true&where=&Name=71159&daterange=&newerval=&newertype=&olderval=&oldertype=&bodyprev=#Post5497390

You can find a description in the Yahoo Carton group as well. Here is a pic of mine:


Post Extras: Print Post   Remind Me!   Notify Moderator  
iluxo
sage


Reged: 09/23/08

One in UK... new [Re: bremms]
      #5657603 - 02/02/13 05:49 AM

There is this http://skylight.myshopify.com/collections/frontpage/products/the-skylight-6

Whether production will resume is an interesting question ...


Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: One in UK... new [Re: iluxo]
      #5657749 - 02/02/13 09:18 AM

Nice, but still 3x the cost of a D&G 6" and you can't get one rigth now. Not too hard to find a used D&G.

Post Extras: Print Post   Remind Me!   Notify Moderator  
ukcanuck
Vendor (Skylight Telescopes)
*****

Reged: 11/07/06

Loc: London, UK
Re: One in UK... new [Re: iluxo]
      #5658377 - 02/02/13 03:38 PM

Quote:

There is this http://skylight.myshopify.com/collections/frontpage/products/the-skylight-6

Whether production will resume is an interesting question ...




There are no production run plans for the Skylight 6, I build them to order only.

The previously mentioned Carton 100/1300's from Sheldon are a good place to start looking for a long refractor. I understood that Sheldon had now sold out (although I could be wrong), but he must have sold quite a few of these objectives over the last two years. So, it would be worth watching the CN Classifieds to see if any turn up (I guess Astromart would be worth watching too if you can).

Maybe even try a Wanted ad...who knows what you might turn up?

Regarding mounting, I test all my long refractors under 4" on a beaten up Meade LXD55 eq (converted to manual only...no motors). Not 'rock solid'...but perfectly capable. I can deal with some movement at the eyepiece and am in no rush.

Long refractors reward the patient...

Edited by ukcanuck (02/02/13 08:25 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bill Friend
super member
*****

Reged: 02/16/12

Loc: Maine
Re: One in UK... new [Re: ukcanuck]
      #5659546 - 02/03/13 09:06 AM

Richard,

Is the Skylight 60mm/F15 still available? If not, are you planning to build more in the future?

Cheers,
Bill


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bill Friend
super member
*****

Reged: 02/16/12

Loc: Maine
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5659554 - 02/03/13 09:12 AM

Bart,

Edmund Optics still offers long FL objectives, albeit pricey compared to what you'll find at Surplus Shed. Rumor has it Edmund lenses are fabricated in Taiwan.

http://www.edmundoptics.com/optics/optical-lenses/achromatic-lenses/large-pre...


Cheers,
Bill


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bart
Carpal Tunnel
*****

Reged: 05/28/06

Loc: Somewhere near Charlottesville...
Re: Manufactures of good long focaL length refractors new [Re: Bill Friend]
      #5659564 - 02/03/13 09:19 AM

Where do I begin figuring out what type of lens I should buy?

Post Extras: Print Post   Remind Me!   Notify Moderator  
ukcanuck
Vendor (Skylight Telescopes)
*****

Reged: 11/07/06

Loc: London, UK
Re: One in UK... new [Re: Bill Friend]
      #5660018 - 02/03/13 01:40 PM

Quote:

Richard,

Is the Skylight 60mm/F15 still available? If not, are you planning to build more in the future?

Cheers,
Bill




Hi Bill, I've sent you a pm.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bill Friend
super member
*****

Reged: 02/16/12

Loc: Maine
Re: Manufactures of good long focaL length refractors new [Re: Bart]
      #5660022 - 02/03/13 01:41 PM

Bart,

I think you have to consider the pros and cons of the lens figure/focal length and how you plan to use it. The better the lens figure, the more it will cost. The longer the FL and better color correction, the less portable it will be and the larger mount required. How do you plan to use it? For a quick peeks at the moon and planets you'll want something that's portable w/minimal cool down period (smaller aperture).

Portability is somewhat subjective. One persons 1000mm handy scope is another persons 40" stick that bumps into everything on the way out to the backyard.

Of course budget is another factor that ultimately decides what you can buy.

Cheers,
Bill


Post Extras: Print Post   Remind Me!   Notify Moderator  
nightfisher
super member


Reged: 11/06/11

Loc: Huddersfield UK
Re: Manufactures of good long focaL length refractors new [Re: Bill Friend]
      #5660143 - 02/03/13 02:53 PM

Im getting tempted to source an ISTAR 103mm f1200 and drop it into the antares with a crop to the tube, this would get rid of the lens with the chip, and shorten it into a more useful scope

Post Extras: Print Post   Remind Me!   Notify Moderator  
Mirzam
Post Laureate
*****

Reged: 04/01/08

Loc: Lovettsville, VA
Re: Manufactures of good long focaL length refractors new [Re: nightfisher]
      #5660291 - 02/03/13 04:24 PM

You could set it up for binoviewing at the same time when shortening the tube.

JimC


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: nightfisher]
      #5660292 - 02/03/13 04:25 PM

Why not a Jaegers 103mm x 1575mm F15 air spaced achromat. They are very good lenses. Surplus Shed was selling them but recently sold out, however if you placed a want add you could probably find one.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: bremms]
      #5664366 - 02/05/13 09:41 PM

http://www.buytelescopes.com/Products/30652-stellarvue-sv102ae-25sv-f11-plane...

here you go hurry if you want one


Post Extras: Print Post   Remind Me!   Notify Moderator  
mikebb
newbie
*****

Reged: 10/28/12

Loc: Baton Rouge, LA
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5664790 - 02/06/13 08:23 AM

Except for the 2.5" focuser, this Stellavue scope looks very much like the ones being sold by AstroTelescope(599) or Canadian Telescopes(499). Web search for more info.

Mike B

Edited by mikebb (02/06/13 08:25 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5664791 - 02/06/13 08:25 AM

Thought we were talking classic refractors/telescopes and wanted to suggest the Americans Alvan Clark & John Brashear, the German Carl Zeiss, the Dutch Piet G Meesters, Japanese Unitron ( sold as Polarex in Europe), etc...

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: PhilCo126]
      #5664793 - 02/06/13 08:30 AM

I do not think they make telescopes anymore

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: mikebb]
      #5664918 - 02/06/13 10:13 AM

It is exactly the same telescope as the one I have, (pictured above)- from Hands on Optics with the exception of the labels and 2 & 1/2 inch instead of 2 inch focuser. The price there has gone up from 499 to 599 recently. They are all three made at Kunming Optical, except Vic checks out the scopes at SV and Gary at HOO. Both, btw, were involved in the original design as I understand it, but Vic baled shortly thereafter as he wanted to focus exclusively on apos.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5668950 - 02/08/13 12:45 PM

Just kidding... do You know about Peak2Valley in Great-Britain?
http://www.peak2valleyinstruments.co.uk/ourservices.html


Post Extras: Print Post   Remind Me!   Notify Moderator  
xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Manufactures of good long focaL length refractors new [Re: PhilCo126]
      #5669665 - 02/08/13 07:42 PM

Quote:

Just kidding... do You know about Peak2Valley in Great-Britain?
http://www.peak2valleyinstruments.co.uk/ourservices.html



Very nice people. Contacted them for my Fullerscopes mount. They have classic stock left.


Post Extras: Print Post   Remind Me!   Notify Moderator  
PhilCo126
Post Laureate


Reged: 01/14/05

Loc: coastline of Belgium
Re: Manufactures of good long focaL length refractors new [Re: xavier]
      #5672229 - 02/10/13 12:00 PM

Check the "New Skylight F15 refractor" topic ...
Skylight refactors:
http://skylight.myshopify.com/products/skylight-gallery


Post Extras: Print Post   Remind Me!   Notify Moderator  
Jim Curry
Pooh-Bah
*****

Reged: 10/29/07

Loc: STL
Re: Manufactures of good long focaL length refractors new [Re: nightfisher]
      #5684687 - 02/17/13 06:46 AM

I built an OTA from the Istar 4" f/12. Perfect 1/6+ wave optics. It'll cruise at 200x without effort.

Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
Astro One
member
*****

Reged: 02/20/13

Loc: San Bernardino County, CA.
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5764606 - 03/29/13 12:57 PM

To me this doesn't seem cheap. I got on the Hands On Optics sight and started shopping for a complete 4" Astro setup. In my cart I put a Vixen PORTA II mount, the 102 mm f/11 refractor, a stellarvue 50mm finder, a SV F2 mounting base, a SV Red Dot finder, and, SV mounting rings for the F50 finder. Total before shipping comes to $1,129.00! Maybe I am just cheap, but to me cheap would be to go with a 6" F8 Orion reflector. With a dob mount, their 8X50 RACI finder the total is 309.98 + tax, so for me it would cost approximately $335.00, now that is cheap to me. Shipping is free right now with Orion. I have a little reluctance with Orion because I owned their 8" reflector six years ago and though the scope performed well it is definitely built cheaply, it is not a piece of beautiful workmanship like my Obsession 15." My interest in one of these set ups is to view double stars. I have a larger scope for my deep sky work. I see myself using this close to home, sometimes right in my back yard complete with a street light near by; less than favorable conditions. Opinions and suggestions please.
Steve


Post Extras: Print Post   Remind Me!   Notify Moderator  
amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Manufactures of good long focaL length refractors new [Re: Astro One]
      #5764650 - 03/29/13 01:10 PM

My question is this: why is Kunming is not making that 4" refractor at a longer focal length, such as f/15 or even better, f/20? F/11 is too short for that aperture in an achromat, in my opinion.

If I'm going to purchase a refractor, I want a refractor... long tube and near-zero RCA.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Astro One
member
*****

Reged: 02/20/13

Loc: San Bernardino County, CA.
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5764706 - 03/29/13 01:31 PM

I'm looking into this!

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: amicus sidera]
      #5764709 - 03/29/13 01:33 PM

If you haven't looked through one (an AT102/F11), don't judge it. I have one, one of the Hand picked ones and the optics are amazing. No more color than a 4 inch Unitron. And it's a heck of a lot easier to mount than an F20 or even an F15. Using modern glass, coatings, hand figuring, and a well baffled tube, Kunming has come up with an excellent alternative. That's why I've been dragging my feet with my 103/F15 Jaegers build. That one is uncoated btw. Still, glad I have one in the vault.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5764918 - 03/29/13 02:47 PM Attachment (26 downloads)

The Fullerscopes MK1V mount is clasic solid no-nonsense
piece of kit, it handles my Istar 150mm f/15 (homemade tube)extremely well.
Here is a photo of the mount compared to a Vixen GP, and one of the big scope on the mount.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Rutilus
Carpal Tunnel


Reged: 12/17/10

Re: Manufactures of good long focaL length refractors new [Re: Rutilus]
      #5764920 - 03/29/13 02:48 PM Attachment (29 downloads)

Scope pointed at Jupiter.

Post Extras: Print Post   Remind Me!   Notify Moderator  
amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5765083 - 03/29/13 03:58 PM

Quote:

If you haven't looked through one (an AT102/F11), don't judge it.




I've looked through one. I've judged it. I find it lacking for my purposes.

Of course, it is a refractor, which is basically a glorified spyglass; not like a reflector, which is, of course, wonderfully color-free. Perhaps I was expecting too much from it.








Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: amicus sidera]
      #5765396 - 03/29/13 05:43 PM

And that is why you need to get what YOU want and that YOU will be happy with. For ME, mirrors are something I like to look at ME WITH, not THRU. I like a telescope that looks like a telescope and not a garbage can

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5765405 - 03/29/13 05:49 PM

Quote:

I like a telescope that looks like a telescope and not a garbage can

Terra




Ah, I didn't realize that it was all about form over function... thank you for clarifying that.



I still say that Kunming needs to increase the focal ratio on their 4" to at least f/15; of course, if the hand-picked ones have less false color than a Unitron of comparable aperture and of greater focal length (by whatever means they do it - surreptitious use of ED glass, or possibly magical pixie-dust flint and crown elements in their objectives?), then I'll have to start looking for one.


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: amicus sidera]
      #5765462 - 03/29/13 06:14 PM

Looks like a gar bage can. WOW strong words. Wonder what kind of war this is going to start

Post Extras: Print Post   Remind Me!   Notify Moderator  
PiSigma
Carpal Tunnel
*****

Reged: 10/14/09

Loc: North Carolina
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5765481 - 03/29/13 06:22 PM Attachment (18 downloads)

Yea, this is a pretty cr@ppy garbage can!

Post Extras: Print Post   Remind Me!   Notify Moderator  
amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5765496 - 03/29/13 06:28 PM

No need for a war of any sort! To each their own...

Heck, I want a nice glorified spyglass to complement my garbage cans!


Post Extras: Print Post   Remind Me!   Notify Moderator  
PiSigma
Carpal Tunnel
*****

Reged: 10/14/09

Loc: North Carolina
Re: Manufactures of good long focaL length refractors new [Re: amicus sidera]
      #5765507 - 03/29/13 06:37 PM Attachment (14 downloads)

Nothing but diversity here.....

Post Extras: Print Post   Remind Me!   Notify Moderator  
Da Bear
scholastic sledgehammer
*****

Reged: 11/21/06

Loc: Kali-Forn-Ya
Re: Manufactures of good long focaL length refractors new [Re: PiSigma]
      #5765574 - 03/29/13 07:22 PM

Terra, et.al

I just picked up the limited edition Stellarvue 102mm f/11 with the Fraunhofer objective. Serial #004 arrived Monday and the lousy weather has not let me set it up. Hopefully this weekend I can let you know how it performs. Fit and finsh are TAK/TV quality.

Da Bear

Edited by Da Bear (03/30/13 10:33 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: Da Bear]
      #5765613 - 03/29/13 07:47 PM

I bet it does not look like a garbage can

Post Extras: Print Post   Remind Me!   Notify Moderator  
moynihan
Carpal Tunnel


Reged: 07/22/03

Loc: Lake Michigan Watershed
Re: Manufactures of good long focaL length refractors new [Re: Astro One]
      #5765636 - 03/29/13 08:05 PM

Quote:

,,, In my cart I put a Vixen PORTA II mount, the 102 mm f/11 refractor,




I think that mount is way to little for that scope. It overwhelms my AT Voyager with wooden legs.


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: PiSigma]
      #5765647 - 03/29/13 08:09 PM

No, that is indeed a beautiful reflecting telescope. They are not my preference, but the classic ones can be very nice. Yours is certainly such an example. Yes, the garbage can metaphor was rash and I apologize for using it. On the other hand, I think dobsonians, regardless of function and utility are not in the same category. Yes, I am sure some are very good, but they are not to my taste nor to my liking.
Yes, form is very important to me. I think a world without aesthetics would be very dull. Does form trump function? No, not always anyway, however sometimes it does, and fashion is always important to a woman.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: moynihan]
      #5765657 - 03/29/13 08:13 PM

You are indeed correct Mr. Moynihan, at least, that is my experience having both the Vixen Porta II and the AT102/F11. I have the heavier wooden legs on my Porta II and still, to get full utility out of the AT102, it deserves a heavier GEM. A Vixen Great Polaris or an Omni CG-4 is ideal given its size (both weight and length).

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5765658 - 03/29/13 08:14 PM

that was not rash. That was a freudian slip

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: Da Bear]
      #5765663 - 03/29/13 08:16 PM

Mr. Bear,

I think you will very much enjoy your new AT102. They are beautifully built and produce lovely images. That is not only my opinion but also that of Mr. DiCicco of S&T.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5765668 - 03/29/13 08:18 PM



Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5765698 - 03/29/13 08:36 PM

Mr. Bear

Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5765896 - 03/29/13 10:50 PM

I had/ have three 102mm achromats. Celestron SP C102, later Vixen A102Mwt Jaegers 102mm F15. The later Vixen and C102 were very similar in correction. They both have a bit more color than I like. The F15 Jaegers is much better at F15. A standard 102mm F11 will not have great correction, no matter how well made. Not bad, but it will be noticeable. At F15 things are better. My 5" F12D&G has noticeable color. It gives great images, but it would be better at F15. It's not just violet halo. CF and green are a good bit defocused. I still like achros, but they are aberrated. Use one right next to a good reflector and it will show itself.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: bremms]
      #5766406 - 03/30/13 10:07 AM

When I get my Jaegers 4inch F15 built later this year and I can do a side by side, I'll let you know what my actual experience is. Until then I am dealing with actual real time experience on the AT102/F11 compared to 10 year old memories of the 4 inch F15 Unitron.

All I can say at this point is if the original poster wants to get a 4 inch long focus achromatic telescope new, in the US market, and not pay 2000 dollars, this, in my opinion, is as good as it gets.


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5766414 - 03/30/13 10:10 AM

Quote:

Mr. Bear




Well of course it's MISTER Bear. After all, we haven't yet been properly introduced.

Terra


Post Extras: Print Post   Remind Me!   Notify Moderator  
Da Bear
scholastic sledgehammer
*****

Reged: 11/21/06

Loc: Kali-Forn-Ya
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5766507 - 03/30/13 10:58 AM

Thanks Terra,

A Soulful Haiku for the CN Classics Forum

Joyful Mister Bear
Each night rambling through the skies,
Ursa's big and small

Da Bear


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Manufactures of good long focaL length refractors new [Re: Da Bear]
      #5766531 - 03/30/13 11:13 AM

As far as 4" shorter focal length achromats. I have one 4" scope and I have no clue who made the optics. I bought it because I wanted the focuser. However, when I tested it I was really surprised how good the lens is. Therfore, I have just used it. The OTA is made out of heavy gauge aluminum so it is rather heavy. Puts up great images with very little color. Looks like to be about a F11 or 12. On the moon it is tack sharp and stars are pin point. So do you need a longer focal length to eliminate color? I really think that a lens that is carefully crafted can provide very nice results on eliminating the colors when the object is in focus.

Post Extras: Print Post   Remind Me!   Notify Moderator  
ngc2289
Post Laureate
*****

Reged: 04/13/05

Loc: Corpus Christi, TX.
Re: Manufactures of good long focaL length refractors new [Re: starman876]
      #5767045 - 03/30/13 03:16 PM

You want to see CA try looking thru a 20" f/16.8! Now that is CA!

Post Extras: Print Post   Remind Me!   Notify Moderator  
jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: Manufactures of good long focaL length refractors new [Re: amicus sidera]
      #5767639 - 03/30/13 09:21 PM

Too hard to ship.



- Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Manufactures of good long focaL length refractors new [Re: jrbarnett]
      #5767651 - 03/30/13 09:26 PM

I really suspect as much, Jim!

Btw, good to see you over here for a change - don't be a stranger!

Fred


Post Extras: Print Post   Remind Me!   Notify Moderator  
jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: Manufactures of good long focaL length refractors new [Re: terraclarke]
      #5767653 - 03/30/13 09:27 PM

I had the pleasure of using one of the prototypes Stellarvue sold to one of its user group members. That was a *very* long time ago. At he time Stellarvue still sold other achromats. The still sell achromats today, too, like the 80ED. Just not slow ones using crown & flint doublets.

It's a very nice scope in any case. I'm glad it has returned.

- Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
buddyjesus
Carpal Tunnel
*****

Reged: 07/07/10

Loc: Davison, Michigan
Re: Manufactures of good long focaL length refractors new [Re: jrbarnett]
      #5767747 - 03/30/13 10:22 PM

there is always the option of making your own from an f/13 carton lens from sheldon.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | 4 | (show all)


Extra information
15 registered and 21 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), Brian Risley 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 4011

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics