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Old Monday 25th September 2017, 14:14   #1
Vámibimbero
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Join Date: Apr 2005
Location: Luxembourg
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20-40x zoom eyepiece for TSN 600/660 series?

Hello everybody,

Did you heard anytime about the 20-40x zoom eyepiece for smaller TSN bodies? Recently I discovered in France throughout a webshop, and I would like to know some info about its optical performance. For me seems that is a long eye relief version, regarding the quite long, foldable soft plastic around the eye lens.

As for me absolutely a new item amongst KOWA eyepiece, I really don't know that should be a hoax or a long time ago rejected, not so famous eyepiece item still in the offer.

Kind regards,

Vámi
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Old Monday 25th September 2017, 15:21   #2
jring
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Hi,

do you have a link? There is nothing about a 20-40x zoom for the small body scopes on the Kowa pages and the only one I know is very old and was a brother of the infamous 20-60x zoom from the 90s.

Joachim
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Old Tuesday 26th September 2017, 09:43   #3
Vámibimbero
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Hello,

Yes, here: http://www.optique-sergent.com/obser...m__A541HD.html

And, amongst the no-more-available eyepieces section, interesting ancient models as 45x wide...

So, what do you think? Big thanks for any informations!

Cheers

Vámi
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Old Tuesday 26th September 2017, 15:02   #4
jring
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Hi,

hm, haven't seen this one yet.
The afov range of 38 to 56 deg is not great for a zoom with 2x range. Modern wide angle zooms have far more afov with a 2x or slightly larger zoom range.

Joachim
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