My SLR lens and both sides of the fuselage have AM What is the difference between the two AM?
A is auto auto zoom, M is manual meaning
A on behalf of auto focus, that is, press the shutter button to complete the focus; M - on behalf of manual focus, that is, need to turn the focus ring on the lens to complete the focus.
No difference, the body of the AF and the lens of the A are the meaning of auto focus. Use, the lens and the fuselage must be allocated to A, in order to auto focus, there is a not A, can not complete the auto focus. Are allocated to M is the manual focus
