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Re: [ATM] Testing a Scope. i'm astigmatic and myopic
On Fri, 23 Feb 2007, Ian McKernan wrote:
> The query is that the in focus images at 200x magnification show the
> stars as crosses??
On or off axis? I have seen spot diagrams that have a combination
of coma and astigmatism that look like crosses. Do you have a
spider or other structure in the optical system?
As for your own astigmatism, I have wondered myself if people have
built scopes to compensate for various vision problems for those
who normally wear glasses, etc. I have never had/needed glasses,
so it has not been a big part of my life, but I have been asked
by friends who have vision problems, not sure how to answer.
Dominic
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