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Zeiss 16X/16 eyepiece?

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#1 chrisg

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Posted 04 February 2013 - 11:09 AM

Been loving my Zeiss PL 10x/18 microscope eyepieces for binoviewing. Truly incredible contrast/color. Now curious about other Zeiss options such as the W16x/16. I haven't seen too much discussion about these lenses, does anyone here have extensive experience with these? :rainbow:

#2 suburbanskies

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Posted 04 February 2013 - 08:10 PM

I've used them enough to know that you really need a slow f-ratio. At f/9, half of the field isn't useable in my opinion. At f/11, things are much improved but not great. No surprise - these are microscope eyepieces designed for very slow systems.

Mark

#3 chrisg

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Posted 04 February 2013 - 10:19 PM

Thanks Mark. Just so I'm clear, are you referring to the W16x/16 that you found unusable? Was this an older or newer version?

#4 suburbanskies

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Posted 05 February 2013 - 07:10 PM

Chris, they are the newest ones. I tried these out last summer. To be clear, they are useable at f/11 but I was hoping for slightly better edge of field performance.

My main goal when I purchased them was to use them for planetary viewing binoviewed. For planets, the edge of field doesn't matter. However, I ran into some unexpected glare issues on Mars. The previous owner had no glare issues, so it might just be due to my setup or my eyes.

In all other respects, these were awesome. I really wished they had worked out!

By the way, I have a pair of Zeiss 25mm aspheric microscope eps and they are my most frequently used eps. Probably paid too much for used eps, but they have been worth it.

#5 chrisg

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Posted 06 February 2013 - 07:14 PM

Interesting - Would you say that edge performance of your Zeiss 16x was worse than your 25mm Zeiss? Which 25mm Zeiss are you using? PL10x/18?
Aside from edge performance, glare, and typical differences associated with focal length, how would you compare other performance parameters?

#6 suburbanskies

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Posted 06 February 2013 - 09:10 PM

Chris, I have a pair of 44 31 41 PL10x/18 eyepieces. Other performance parameters were the same, if I trust my memory.

Build-wise, the 16x is definitely better (they are metal, not like the light, plastic housing of the 10x) and they have built-in diopter adjustment.

It's too bad it didn't work out. I have to admit I did not spend a lot of time comparing center of the field performance because the glare problem made me make a quick, definite decision.

I'm not sure what you intend to use these for, but if you are mostly planetary, it might be worth to try out for yourself. Eyepieces tend to be individualistic.

Also, at least two other frequent posters on CN have used these eps. Maybe they will share their experiences?

Mark






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