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The Electro-Focus (EF) mount has been the standard lens mount for Canon cameras since it's introduction in 1987.

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29
votes
9answers
61k views

What is the difference between EF and EF-S lenses?

This is specific to Canon, but what is the difference between EF and EF-S lenses?
4
votes
2answers
8k views

What's the difference between Canon EF-S and EF-M?

What is the difference with Canon EF-S and EF-M lens?