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Source of ED 80mm fl ~900mm doublet

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#1 rob1986

rob1986

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Posted 24 May 2024 - 07:18 AM

Entertaining myself with the perverse idea of dropping one inplace of my powerseeker c80 objective.

Are such lenses commercially available?

#2 Jon Isaacs

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Posted 24 May 2024 - 07:24 AM

Rob:

 

ED Doublets are generally only available in complete telescopes..  I have never seen or heard of a 80mm F/11 ED doublet.

 

Jon



#3 rob1986

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Posted 24 May 2024 - 07:43 AM

The other much more realistic option is upgrading it to a 90mm f10, they use the same tubes, but I'm loathe to lower the cromatic ratio.


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