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Equipment Discussions >> Eyepieces

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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: Pentax XW's Toast? new [Re: Scanning4Comets]
      #5704097 - 02/27/13 07:34 PM

I only seen the rain nebula all day...lol!

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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Pentax XW's Toast? new [Re: MRNUTTY]
      #5704145 - 02/27/13 07:55 PM

Quote:

I only seen the rain nebula all day...lol!




Did you try a filter? or was the non-filtered view better?


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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: Pentax XW's Toast? new [Re: Scanning4Comets]
      #5704161 - 02/27/13 08:01 PM

My glasses were so fogged up, I couldn't tell one filter some another!

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ausastronomerModerator
Carpal Tunnel
*****

Reged: 06/30/03

Loc: Kiama NSW (Australia)
Re: Pentax XW's Toast? new [Re: george tatsis]
      #5704173 - 02/27/13 08:07 PM

Quote:

Quote:

Quote:

Hi Mark,

If you used the 2" 2X GSO barlow that IMO is the weakest link in the chain. I would be interested to see if the results change with a top grade 2X barlow.

Cheers,




Hi John,

I would agree with that statement 100%!

What I found weird was the views of Jupiter with the 2" GSO Barlow + 10mm XW showed considerable CA, and just the opposite with the 5mm Vixen LVW alone! I don't recall seeing this before.

Cheers,




I remember seeing CA with all my Pentax XWs when I still had them,about 6 months ago.And that was with no barlow in the light path on an Orion Optics 10" f/6.3 reflector. The Radians on the other hand presented none!




Hi George,

I can't really agree with that assesment. Over the past couple of months I have done quite a bit of testing for my 6mm eyepiece review. I hope to have something properly written up within the next month or two on this review.

What I can say is that in terms of lateral colour control on bright objects at and near the edge of field I rated these three eyepieces as follows:-

7mm Pentax XW = 8/10
6mm DELOS = 8/10
6mm TV Radian = 7/10

That having been said the Radian was quite impressive in some other areas. Even allowing for the difference in FOV, I found the Radian to outperform the DELOS fairly comfortably in edge of field sharpness where I rated the same three eyepieces as follows:-

7mm Pentax XW = 8.5/10
6mm DELOS = 7/10
6mm TV Radian = 9/10

These results were arrived at in my premium 10"/F5.3 newtonian without paracorr.

Cheers,


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george tatsis
professor emeritus
*****

Reged: 11/20/08

Loc: Flushing, NY - Europe
Re: Pentax XW's Toast? new [Re: ausastronomer]
      #5704504 - 02/27/13 11:17 PM

Hi John,

I mentioned the better performance of the Radians specifically for my 10" scope. However, when I had the TV-85 some Radians were prone to exhibiting CA as much as the Pentax XWs,but not more.Of course, the TV-85 is not as perfect as some folks make it out to be, since some color is evident in high mags

John,since you mentioned it! I think you should restart the 6mm comparo thread ,if the weather has been good enough to let you draw some conclusions that is!


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mich_al
Carpal Tunnel
*****

Reged: 05/10/09

Loc: Rural central lower Michigan ...
Re: Pentax XW's Toast? new [Re: WStewart]
      #5704876 - 02/28/13 08:32 AM

Quote:

Nope, bought it new from Adorama .....




There's your first problem! They burned me over 2 years ago and I still get a knot in my stomach every time I see their name.


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WStewart
professor emeritus


Reged: 11/02/05

Loc: Dallas, TX
Re: Pentax XW's Toast? new [Re: mich_al]
      #5705020 - 02/28/13 09:58 AM

I've bought from Adorama before without any problems (I used to buy from them all the time when I was still shooting film).

Anyway, I got the 5XW unstuck with these ($5 at Home Depot)...it took all of 5 seconds, after spending half an evening struggling with it bare-handed (during which there was great gnashing of teeth).

I now have a happy, well-adjusted (get it?) eyepiece collection.


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Pentax XW's Toast? new [Re: WStewart]
      #5705060 - 02/28/13 10:31 AM

And another item finds it's way into the "NonAstronomy Items Used for Astronomy" Hall of Fame.....

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WStewart
professor emeritus


Reged: 11/02/05

Loc: Dallas, TX
Re: Pentax XW's Toast? new [Re: csrlice12]
      #5705070 - 02/28/13 10:36 AM

They've earned a spot in my eyepiece case because I'm pretty sure they'd work well with stuck filters, too.

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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: Pentax XW's Toast? new [Re: WStewart]
      #5705080 - 02/28/13 10:41 AM

The gloves I use for viewing have rubber on the palms and fingers so that I can "grip" an eyepiece. it also has material on the index fingers to operate smartphones/tablets. They were made for running, but work great.

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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Scotophobe Maryland, USA
Re: Pentax XW's Toast? new [Re: csrlice12]
      #5705095 - 02/28/13 10:50 AM

I need a pair of Gorilla Gloves! I mean literally gloves made for gorillas. The problem is, I have gorilla-like hands, so human gloves seldom fit. My palms are wide and thick, and the fingers are relatively short. I don't wear gloves at the telescope, no matter how cold it gets, and despite the fact that my hands get very, very cold.

Gorilla Hand - a somewhat exagerrated resemblance to my own hand

Mike


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Pentax XW's Toast? new [Re: Sarkikos]
      #5706233 - 02/28/13 09:33 PM

Oh Gawd,

That hand is so gross. Thanks for the visual Mike.


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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Scotophobe Maryland, USA
Re: Pentax XW's Toast? new [Re: Scanning4Comets]
      #5706249 - 02/28/13 09:40 PM

I did say it was an exaggerated resemblance!


Mike


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Pentax XW's Toast? new [Re: Sarkikos]
      #5706884 - 03/01/13 09:54 AM

What's an Orion Stratus doing in the Puzzles and Toys section????

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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Scotophobe Maryland, USA
Re: Pentax XW's Toast? new [Re: csrlice12]
      #5706992 - 03/01/13 10:58 AM

I don't see that, but I see a lot of other neat things! Maybe I can convince my daughter to get some of these curiosities for Christmas or her birthday.


Mike


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Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Pentax XW's Toast? new [Re: Sarkikos]
      #5707216 - 03/01/13 01:42 PM

Quote:

I don't wear gloves at the telescope, no matter how cold it gets, and despite the fact that my hands get very, very cold.




Hi Mike-

Not being an experienced cold-weather person myself, i've recenly learned how much BETTER at keeping fingers warm *mittens* are, where the fingers remain together within the same 'enclosure'. Makes sense, now that i think about it...

Would mittens fit hour hands better, maybe? My new mittens have nice end-flaps where the thumb and/or fingers can be exposed for tactile purposes, then re-covered when desired.


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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: Pentax XW's Toast? new [Re: Mike B]
      #5707290 - 03/01/13 02:37 PM

Mike goodness! Not to know the difference between mittens and gloves! How bout galoshes and boots? :-)

Seriously, mittens are the way to go for cold fingers and hands. Now, what would fingerless mittens look like?


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Ontario, Canada
Re: Pentax XW's Toast? new [Re: MRNUTTY]
      #5707351 - 03/01/13 03:15 PM

Quote:

What's an Orion Stratus doing in the Puzzles and Toys section????




The last Orion Stratus I had should be put in the Kaleidoscope and Puzzles & Toys section.

CA started at about the 65% mark and was only, (barely), even sharp in the center.


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Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Pentax XW's Toast? new [Re: MRNUTTY]
      #5707480 - 03/01/13 04:53 PM

Quote:

Mike goodness! Not to know the difference between mittens and gloves! How bout galoshes and boots?






"galosh" is the sound my boots make when they're leaking?


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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Scotophobe Maryland, USA
Re: Pentax XW's Toast? [Re: Mike B]
      #5707706 - 03/01/13 07:49 PM

Quote:

Quote:

I don't wear gloves at the telescope, no matter how cold it gets, and despite the fact that my hands get very, very cold.




Hi Mike-

Not being an experienced cold-weather person myself, i've recenly learned how much BETTER at keeping fingers warm *mittens* are, where the fingers remain together within the same 'enclosure'. Makes sense, now that i think about it...

Would mittens fit hour hands better, maybe? My new mittens have nice end-flaps where the thumb and/or fingers can be exposed for tactile purposes, then re-covered when desired.





I've tried just about every type of glove or mitten or glove-mitten. None are exactly what I want or need, and I eventually end up tearing them off when observing, even when the temps are in the 20's. Basically, gloves just get in my way.

The best "glove" is a warm-up session in the car every hour or so. Luckily, I can easily set my crossover so that no white lights will come on when I start up the vehicle. And I've Velcroed Rubylinth filters over the overhead lights. I don't need no stinkin' gloves!


Mike


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