Yesterday's haul was a really clean Pentacon Electric (M42 with electrical sensors for aperture) 135/2.8 and a clean Cambron(???) 35-100/3.5 in Nikon AI-s mount, a set of three 52mm close up lenses, a fairly crappy M42 2x converter, and something I've heard of but never seen before - a Sigma auto t-mount, basically an ordinary M42 T2-mount but it has a pin for auto stopdown. Apparently Sigma made a few lenses that could use this mount and mounts for several different lens fittings, but since the only automation supported was the stop-down button, and the camera makers were adding additional connections between the camera and lens, it didn't catch on. I got the lot for £18 which should be a modest profit, but the only reason I bought the Nikon-fit lens was to encourage one seller to keep putting old cameras aside for me, I suspect that one will break even at best and possibly lose money. But I've made a good profit on things I've got from him in the past year or so, so it's worthwhile.
It's amazing how heavy those old lenses are compared to the modern equivalents - the Pentacon is 500g+, the Cambron zoom 460g. All-metal construction, of course. My Tamron 28-300 3.5-6.3 weighs less than either of them.
Last edited by Marcus Rowland; 10-30-2017 at 04:11 PM.