Vivitar makes a couple of SLR's which use the K-mount. Seem to be decent basic mechanical SLR's, with TTL meter, much like the classic Minolta SRT's. These are listed on the Freestyle and Calumet websites around $150! The Zeiss lenses might be great additions to this camera. I haven't looked at one of these Vivitars in person, but maybe I will. I couldn't find anything on them on Vivitars US website but they are listed on the UK website. Go figure.