Quote:
Originally Posted by Shiraz
thanks very much for the input Paul. I am convinced that the small pixels compensate exactly for the short fl, so will continue down this path - maybe give you the opportunity to say @I told you so@ at a later date - 
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I am not sure the sampling rate will be what you expect with short focal length and small pixels. Think of it like this; that with a longer focal length you will get more data for an object over more pixels. I recommend that using larger pixels with a longer focal length. Just like planetary imaging if you don't use a barlow or powermate you can only capture so much detail and can only resample to a certain extent. You will never get the same sort of detail that you would with a longer focal length scope. Just check out any galaxy which is reasonably distant (not the close ones) and go looking for images of that object via google. Then check out the scopes used. It will be uncommon to see short focal length scope capturing detailed images of those galaxies.