Attached Link: http://homepage.mac.com/mattdenton/photo/cameras/praktica_mtl3.html

Looks like you've got a very nice, rugged workhorse of a camera there, Mike. It seems that that camera has rather noble bloodlines, in that the West German half of the company (Zeiss Ikon) that made the Praktica made the Contax. The East German half made your camera.

The camera takes standard M42 screwmount lenses, which is
nice because there are still a lot of good sharp lenses with
M42 mounts out there on the used market.

I can't find any info specific to your lenses, but Carl Zeiss
lenses generally get very good marks for being sharp.

135mm is a good focal length for portraits, BTW.