The A2 was designed for use with A bodies accept the AT-1 apparently. It has 2fps speed and can be shot single frame or continuous. It takes four AA batteries, so it has weight, but not too much. I leave mine attached to the AL-1 to "fix" the battery door design flaw. It has a rewind button and a remote socket. The battery chamber is locked with a screw that is opened with a coin. There is also a trip mount socket. Simple but effective.