Canon lens ef what does it mean

Answer:

The reason is simple, because the size of the EF-S lens group is relatively small, but also a small length than the EF, such as installed in the full frame body, full frame SLR reflector will hit the EF-S lens After the group above, so EF-S lens can only be used in the Canon non-full frame (APS-C frame) above the body to go.

Canon digital SLR lens has two kinds of bayonet: EF and EF-S respectively. EF mount lens, not only can be used in full frame SLR above, and all Canon digital SLR cameras can be used. EF-S lens can only be used in Canon APS-C frame SLR. The reason is simple, because the size of the EF-S lens group is relatively small, but also a small length than the EF, such as installed in the full frame body, full frame SLR reflector will hit the EF-S lens After the group above, so EF-S lens can only be used in the Canon non-full frame (APS-C frame) above the body to go.