Quote:
Originally Posted by Bassnut
Beware charitans that use "fast" f6 or less scopes, you will lose your self in boring done-that widefield rubbish that pollutes our LCDs and dillutes the pure pursuit that is true "deep sky" astrophotography 
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C'mon Fred, you can't just quote focal ratio. An f5 scope and camera with 6 micron pixels will give exactly the same speed, image scale and resolution per pixel and the same difficulty of guiding as an f10 scope of the same aperture with a 12 micron pixel camera. Also, remember the "
myth of focal ratio" and also
here
Geoff