sigma lens question

Is it possible to use older sigma prime ef lenses on digital bodies if used in manual mode only?

A lot of 'old' Sigma lenses refused to work with more modern DSLR's - What the problem was/is I'm not sure, but if it's a general communication problem, I doubt the camera will recognise the lens and probably won't operate the aperture/iris. If it's just AF then you will probably be OK.

All you can do is to try them on your body.

Sigma were offering to re-chip certain lenses to make them compatible but I believe they no longer do this.

didgit wrote in post #11645343
Is it possible to use older sigma prime ef lenses on digital bodies if used in manual mode only?

I had an older (circa 1996) Sigma 400mm lens. It worked fine in full manual mode except no control over anything (including aperture). So, was always shooting with the lens full-open, manual focus. I sold that lens and purchased the much newer Sigma 150-500mm.

i always thought i read that you could still use the lenses wide-open...but that's it...so if it's like a sigma 50mm f2.8 you can use it perfectly fine at f2.8, or a 400mm f5.6 will AF and everything at f5.6...anything else will give an error code..

and as mentioned above sigma will rechip some lenses to work entirely