Quote:
Originally Posted by prova
Just a question for those who do image with any sort of Refractor, I'm just wondering what the sweet spot is as far a aperture?
eg. Skywatcher ED100 with a short-tube 80mm autoguider?
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What do you mean 'sweet spot' ?
If your talking about a lens where the aperture can be adjusted that's different but at prime focus on a scope you can't adjust the aperture setting on the camera.