Quote:
Originally Posted by Emuhead
should I be realistic and just be content with detail at 1200mm or less?
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Yes you should.
The detail is decided by the aperture but
is in practical terms controlled by "the seeing".
Your 200mm aperture is giving you a Rayleigh Limit of .69 arc seconds.
https://astronomy.tools/calculators/...e_capabilities
I know that in Melbourne the best seeing I ever measured -
by using the FWHM of stars was 2.8 arc seconds.
That is well short of the 0.69 arc seconds capability of your scope.
So - we are limited by seeing not by focal length.
cheers
Allan