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 >> Eyepieces

Pages: 1 | 2 | 3 | (show all)
SteveC
Post Laureate
*****

Reged: 06/15/06

Loc: Sunshine State & Ocean State
Re: ZAO I vs. ZAO II...? new [Re: Sarkikos]
      #5843300 - 05/06/13 11:15 AM

Quote:

Take into account that his Mak is an f/20.


Mike




That's the reason why I stopped searching for the 34mm ZAO, not enough power even for my f/15 Mak...................that and the cost, I'm retired and on a budget. I'm waiting for my wife to break her budget deal - I need another mount.

Edited by SteveC (05/06/13 11:23 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
vahe
professor emeritus


Reged: 08/27/05

Loc: Houston, Texas
Re: ZAO I vs. ZAO II...? new [Re: Scott99]
      #5843454 - 05/06/13 12:28 PM

Quote:


Could it be that larger lenses somehow deliver better contrast? Maybe because the light is spread out over a larger area of glass.





For visual astronomy there are three factors that contribute to a satisfactory performance, scope, eyepiece and the eye. Eyepiece and eye interface and compatibility is one reason why super high quality short focal length and short eye relief eyepieces just do not deliver the same level of performance as the longer focal length eyepieces.
I have tried 4 & 6mm ZAO eyepieces and decided thanks but no thanks, not for my eyes.

Of course with longer focal length eyepieces one will need long focus telescope if high magnification is the goal.
Optically a 4mm and 25mm ZAO may be of equal quality but not when you factor in the limitation imposed by our eyes, or at least my eyes for sure.

Vahe


Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: ZAO I vs. ZAO II...? new [Re: Sarkikos]
      #5843496 - 05/06/13 12:46 PM

My only Zeiss lens is the one in my smartphone camera. Therefore, I'm volunteering; send me your losing ZAOs and I'll make sure they're properly diciplined (may take a few years, you know how those ZAOs can be).

Post Extras: Print Post   Remind Me!   Notify Moderator  
Paul G
Post Laureate
*****

Reged: 05/08/03

Loc: Freedonia
Re: ZAO I vs. ZAO II...? new [Re: vahe]
      #5843577 - 05/06/13 01:19 PM

Quote:

I have tried 4 & 6mm ZAO eyepieces and decided thanks but no thanks, not for my eyes.




It's interesting how tastes differ. After the ZAO I's sold out and started to come up on the used market, the 4mm seemed the least wanted in the US but in Europe it was the most wanted of the set and commanded the highest prices used.

I used to cut off my eyelashes to use the 4 and 6mm, now I just use an eyepiece with greater eye relief.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Starman81
Carpal Tunnel
*****

Reged: 03/06/08

Loc: Metro Detroit, MI, USA
Re: ZAO I vs. ZAO II...? new [Re: Paul G]
      #5843664 - 05/06/13 01:55 PM

Quote:

Obligatory pic:






Obligatory WOW!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Suburban Maryland, USA
Re: ZAO I vs. ZAO II...? new [Re: csrlice12]
      #5843674 - 05/06/13 02:00 PM

Quote:

My only Zeiss lens is the one in my smartphone camera. Therefore, I'm volunteering; send me your losing ZAOs and I'll make sure they're properly diciplined (may take a few years, you know how those ZAOs can be).




This must have been directed to the thread in general or someone else in particular. I don't have any ZAO's. The closest I have to ZAO's are my two XO's.


Mike


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

Reged: 03/24/06

Loc: 40° 47' 52" N / 85° 49' 14" ...
Re: ZAO I vs. ZAO II...? new [Re: Levine]
      #5843690 - 05/06/13 02:09 PM Attachment (17 downloads)

Obligatory pic #2:

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

Reged: 06/02/09

Loc: Houston, Texas, USA
Re: ZAO I vs. ZAO II...? new [Re: Levine]
      #5843756 - 05/06/13 02:44 PM

OK. I'll ask again, what exactly were the differences in the diffraction patterns that your friend saw to allow him to draw his conclusion? Did he see surface roughness, astigmatism, more scatter, what?

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

Reged: 06/02/09

Loc: Houston, Texas, USA
Re: ZAO I vs. ZAO II...? new [Re: RodgerHouTex]
      #5843764 - 05/06/13 02:48 PM

And wait, Roland considers Brandon one of his BEST planetary eyepieces.

I have the black anniversary set.


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

Reged: 03/24/06

Loc: 40° 47' 52" N / 85° 49' 14" ...
Re: ZAO I vs. ZAO II...? new [Re: RodgerHouTex]
      #5843776 - 05/06/13 03:01 PM

Quote:

OK. I'll ask again, what exactly were the differences in the diffraction patterns that your friend saw to allow him to draw his conclusion? Did he see surface roughness, astigmatism, more scatter, what?




He did not specify or elaborate.



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

Reged: 06/02/09

Loc: Houston, Texas, USA
Re: ZAO I vs. ZAO II...? new [Re: Levine]
      #5843935 - 05/06/13 04:27 PM

Thanks for the response Levine.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Paul G
Post Laureate
*****

Reged: 05/08/03

Loc: Freedonia
Re: ZAO I vs. ZAO II...? new [Re: Levine]
      #5844177 - 05/06/13 06:39 PM

Quote:

Obligatory pic #2:




Sweet! Congrats on scoring the 34.


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

Reged: 03/24/06

Loc: 40° 47' 52" N / 85° 49' 14" ...
Re: ZAO I vs. ZAO II...? new [Re: Paul G]
      #5844234 - 05/06/13 07:14 PM

Quote:

Quote:

Obligatory pic #2:




Sweet! Congrats on scoring the 34.




Thanks!


Post Extras: Print Post   Remind Me!   Notify Moderator  
stevenwav
sage
*****

Reged: 02/06/12

Loc: New England
Re: ZAO I vs. ZAO II...? new [Re: Levine]
      #5844545 - 05/06/13 10:16 PM Attachment (8 downloads)

I had bino pairs of both sets. I felt it was a bit redundant having both sets and I obviously had a lot of money tied up in them. I became quite interested in planetary and lunar observing and consequently my scope collection started to feature longer and longer focal lengths.
Having read about the development of the ZAO first generation ep's, I discovered that they were originally created to optimize the Zeiss APQ line- with focal lengths of f/8. Of course, they would optimize any focal length but they were made with the APQ series in mind. As a previous post mentions, the ZAO II's are optimized for faster scopes, but of course, excellent for all others as well.
As my focal lengths went up, f/8 - f/20 for my planetary specialists, it became an obvious choice to stick with the first generation ZAO's for me. I guess I am a purist.
It should be noted that the CZJ's are also excellent, and they were optimized for f/10 according to what I read, but again, they are terrific across the board. The 16's even beat my ZAO II bino pairs on the moon one night when I compared them - more contrast and detail seen on that particular night, under that particular sky (tmb 100/800).

Edited by stevenwav (05/06/13 10:30 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
vahe
professor emeritus


Reged: 08/27/05

Loc: Houston, Texas
Re: ZAO I vs. ZAO II...? new [Re: stevenwav]
      #5845038 - 05/07/13 07:45 AM

Quote:

lengths.
As my focal lengths went up, f/8 - f/20 for my planetary specialists, it became an obvious choice to stick with the first generation ZAO's for me. I guess I am a purist.






What F/20 do you have? I am just curious as I believe that F/20 seems to be the ideal ratio for dedicated planetary scope if you happen to be a purist.

Also, do you have any experience with Pentax SMC Orthos, I have recently completed pairs of 6, 7, 9, 12 & 18, the 6mm has a nasty eye relief and is very uncomfortable to use, the 7mm is just about the shortest useable eyepiece from that series.

Vahe


Post Extras: Print Post   Remind Me!   Notify Moderator  
stevenwav
sage
*****

Reged: 02/06/12

Loc: New England
Re: ZAO I vs. ZAO II...? new [Re: vahe]
      #5845216 - 05/07/13 09:59 AM

Hi Vahe - my Royce Optics DK 10" is at f/20. Recently acquired, i haven't had time to fully utilize it yet. It has the smaller co, so it is optimized for planetary.
I have not used the Pentax SMC but was offered a set in trade. I would be very interested in your evaluation of them for future reference.


Post Extras: Print Post   Remind Me!   Notify Moderator  
etsleds
sage
*****

Reged: 11/14/09

Re: ZAO I vs. ZAO II...? new [Re: stevenwav]
      #5846374 - 05/07/13 07:02 PM

Steve, the Pentax work very well in the AP178, excellent field correction at that focal ratio and lovely overall performance.

Post Extras: Print Post   Remind Me!   Notify Moderator  
vahe
professor emeritus


Reged: 08/27/05

Loc: Houston, Texas
Re: ZAO I vs. ZAO II...? new [Re: stevenwav]
      #5846569 - 05/07/13 08:41 PM

I would rate Pentax SMCs the next best Orthos after ZAOs, my favorite planetary SMC is the 18mm, its my Jupiter eyepiece with MC200/20 giving x277. The other favorite is the 9mm, I just recently completed SMC 7mm pairs but have not tried them yet, the 7s produce x250 with my AP155 EDT right at that scopes optimum power for Moon & planets.
Too bad Pentax did not continue the series with longer than 18mm.

Vahe


Post Extras: Print Post   Remind Me!   Notify Moderator  
stevenwav
sage
*****

Reged: 02/06/12

Loc: New England
Re: ZAO I vs. ZAO II...? [Re: etsleds]
      #5846670 - 05/07/13 09:26 PM

Not what I wanted to hear -LOL! I'm trying to achieve a sense of peace and contentment over here. I was afraid I was missing out on something by passing on the Pentax set. I may just have to try them if I get a chance at some again.

Post Extras: Print Post   Remind Me!   Notify Moderator  
etsleds
sage
*****

Reged: 11/14/09

Re: ZAO I vs. ZAO II...? [Re: stevenwav]
      #5846696 - 05/07/13 09:44 PM

Nah, Steve, not a problem when you have the ZAO set!

The Zeiss essentially do everything well without serious deficits. On a night of superb seeing, nothing really beats them.

The Pentax I use more often because they are cheaper, are more of a full system focal lengths, and on less than perfect nights lose nothing to the ZAO-IIs. Other minimal glass performs superbly, but there are more obvious compromises under normal seeing, eg the TMB Supermono fov, the Tak MC glare control, etc.

For the AP178, I use the 7mm and 9mm the most for 178x and 229x - my seeing usually supports that and I just don't find planetary viewing below about 150x much fun anyway. If seeing supports better, out come the ZAO-IIs and 5XO, if worse, switch to Nikon SWs for a more comfortable & wider view.

Maybe picking up a 7mm or 9mm is the ticket?


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


Extra information
20 registered and 36 anonymous users are browsing this forum.

Moderator:  ausastronomer, Scott in NC, iceblaze 

Print Thread

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


Thread views: 1847

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics