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Old 26-07-2014, 12:37 PM
astro744
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Join Date: Apr 2007
Posts: 1,244
Quote:
Originally Posted by Don Pensack View Post
Perfect optics + Perfect collimation + Perfect equilibrium temperatures in the optics + perfect eyepiece + tracking + bad seeing = bad image.
Alas.
Exactly what I was getting too earlier in the discussion, I just didn't add all the parameters as I had done so in a previous similar thread a while back.

You can also add bad eyesight to the mix. If any one is bad the result is bad.
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