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Re: 35mm Camera Tele Lenses Converted To Telescope?

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Posted by Kip on December 30, 1999 19:20:55 UTC

Unfortunatly the lenses you described would have a very, very short focal length. Most refractor type lenses (Achromatic) are 2 element lenses with at least a f/8 focal. The norm is between f/8 to f/11 for standard refractors. The 500mm lens would make a decent scope if it were f/8 or more. Focal ratio is the key here, f/2 or f/4 is way too short. Camera adapters for telescopes would be the way to go. Buying a standard quality refractor for astrophotography is a better way to go IF you have a camera that can do what is needed for astrophotography. Most newer cameras are not siuted for this. Good Luck!!

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