Hi Murray,
That's not the autofocus model. (Mind you, mine doesn't really autofocus.) You'll definitely want to check out the mirroring in the dome, and there should be a difusing sheet that goes about the negative carrier. It'll be more opaque in the middle. When I actually used mine, I used an Aristo t1212 cold light head with it. That worked great, but they're expensive. Since these don't have any heat reflecting glass, be careful not to cook any negatives. Operation is straight forward.