[ATM] Amateurish question regarding a CP for a parabola

["Jim" <jim@idexer.com>]

I have a nice F3.5 parabola that would break my heart to change....and
so I was wondering of an overly simplistic approach regarding
correcting curvature and coma. Now, tell me is I am way off base with
my thinking here:

A corrector plate that matched the mirror curvature could theoretically
correct for curvature because it would cause the rays to arrive at
focus at the same time? I was thinking a friend of mine who does glass
work could make a impression of the mirror and pour me a lens....if
this was possible would it really correct anything in practice or is my
thinking on this problem all wrong?



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