Sigma 75-300 lens that you used on a canon rebel xt film camera - you try to use it on a canon 20d an usually get an Err 99 error message - what can you can do?

Answer No, I have tried it and it didnt work.

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Will a Canon EOS Rebel GII film camera lens work on a DSLR?

Yes, the Canon EOS Rebel GII camera's lenses will work on any Canon compact sensor or full-frame sensor Canon DSLR. The Canon EOS Rebel GII uses Canon's EF series of lenses.Source:Porters Official ... Read More »

You are thinking about buying a Canon EF 200mm f2.8L II aunto focus telephoto lens and am wondering if it will fit on both your canon rebel k2 35mm and also your digital canon rebel XSi?

Short answer,"yes."The Canon EF 200mmm lens is designed to fit a "full-frame" Canon EOS camera - film or digital. It will also fit all Canon DSLR's that have the smaller APS-size sensor, including ... Read More »

When I turn on my canon G10 it always appears lens error message and restart camera?

Well... The one thing to consider is a lens error. Without much to work on your only choice really is to bring it to Canon's service center.

Is there an adapter made for the canon EOS rebel lens to allow the canon AE-1 lenses to fit the canon EOS rebel.?

Canon EOS Rebel has EF, EF-S mount and is and EOS camera, Canon AE-1 has FD mount. Yes, there is and FD-EOS adapter.