Can a sigma lens fits both nikon and canon?
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I have a 28-80 mm sigma lens that fits my Nikon N65. How can I use this lens on a Canon T2i dslr camera? Or can I?
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No, you can't.
They're made with either a Canon OR Nikon mount, the one you have for your Nikon will NOT fit any Canon camera.
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This is the reason most people do not change camera systems, once they have picked one.
The cost of replacing their current lenses becomes prohibitive.
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Yes, only if you have both lens mounts which would be a pain to replace each time you want to swap bodies.
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Lens mount adapters are sold, but using a lens that wasn't made for your camera will eliminate a lot of the functionality of it. Not worth it!
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