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Old 07-04-2018, 06:53 AM
Stefan Buda
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Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 823
Quote:
Originally Posted by Joshua Bunn View Post
Hi Stefan,

I know that in my planewave CDK 12.5, there are 2 elements, but I can't speak for the larger scopes.

Josh
Hi Josh,

That's interesting, are you sure it is not 2 groups of 3 elements?

I have not tried, but it may be possible to have 2 elements at f/7 and achieve the extra large field. Or maybe they did go aspheric with one of the lens surfaces, as rally suggested earlier in this thread.
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