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Might be a dupplicate, but I don't think it is...
Looking here : Comparaison of a Canon 1200D and a Nikon 3100
I've seen that the Canon 1200D has a mount type called "Canon EF-S".
I know that you cannot mount EF-S lens on a full frame, but I never quite realized that camera had their mount specification as well (which is logical but still...)
Anyway, does it mean that you cannot mount an EF lens on this kind of entry level DSLR ?