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Compatibility is a state in which two devices can work together. In photography compatible gear can be used together. An example of this is a lens and a camera sharing the same mount.

6 votes

How can I fix Err 01 with a film-era Sigma lens on a Canon DSLR?

This is old question but problem is still actual on old lenses. What you need is protocol interface which converts aperture change command from camera to lens. Please see my article at this link where …
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