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Old 04-08-2020, 05:57 AM
Don Pensack's Avatar
Don Pensack
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Don Pensack is offline
Join Date: Aug 2006
Location: Los Angeles
Posts: 404
Originally Posted by Stonius View Post
" It is the edge of the field where the major differences between eyepieces exist."

Thanks for that very informative post, Don. Would it be true then to surmise that edge of field performance will be worse the wider the AFoV is? (not just for TV, but for any EP?)

Not necessarily. There are poor 70 eyepieces and superb 100 eyepieces.
It does seem , however, that the wider the field the more it costs.

One other concern is the f/ratio of the scope. Correcting an eyepiece for a fast light cone requires more lenses and a different design than designing the eyepiece for f/8-f/10. And cost sometimes relates to how well corrected the eyepiece is at fast f/ratios.
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