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goldwater58
I'm quite new to astrophotography and have a question regarding setting the appropriate aperture setting in Backyard EOS. Do I simply match it to my telescope's focal ratio? I'm using an 80mm f/6 refractor with a 480mm focal length and intend to use my camera (Canon T3i) in a prime focus fashion. I'm looking to capture some DSO's if that helps. Again, I know this is more than likely a very noobish question but all help/advice is appreciated.
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Dirty Harris
Hey there Goldwater 58, just a couple other things that may be of help. I too have a Canon T-3 Rebel similar to yours. I have found that when trying to shoot DSO that a solid polar alignment is critic
astroman133
When using a DSLR at prime focus the aperture is not selectable. It is fixed because the aperture and focal length of the telescope are fixed. In fact, I do not believe that the f/stop is even display
s3igell
When you are doing Prime Focus DSO Imaging (DSLR connected to a Telescope), the Aperture and Focal Length (and therefore the Focal Ratio - f/stop) are permanently dictated by the Optics utilized (Scop
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