Re: [ATM] Using Barlow to reduce Coma

[Andy Saulietis <iss@pvtnetworks.net>]

Jean-Guy asks,


>will there be more, the same, or less coma at the edges of the image if
>i replace my 10" f/4 with a 20" f/4 ?

The amount of coma will be exactly the same, coma varies linearly only
as a function of f#.




Andy Saulietis
ISS Enterprises
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