Originally posted by peggers always wondered about how the MEF worked. It had auto focus but could I ask how quick and accurate the auto focus was? And, as I recall, you needed a particular lens to make it auto focus. Was there only one lens available that auto focussed? Was it a battery chewer? Did other manual focus lens still work on the camera?
As no-one has answered that yet, there was only one AF lens that worked with the MEF, a 35-70mm zoom. You could put manual focus lenses on the camera and with them you did get a focus guide in the viewfinder. Otherwise the camera was similar to an ME Super.
I admit I never had one, but understand the AF was a bit clunky, and as a system it went no further - ie not compatible with later Pentax AF systems. But it was a first step into AF and for some it was a significant advance for its time.