Of all the lenses I have picked up at thrift stores, I have been able to identify every mount save one: This Tele-Lentar 300mm prime telephoto lens. So, I am appealing to the Intartubes for help. The lens has some sort of swappable intermediate mount, so I really have 2 chances of figuring out an adapter solution – either figuring out what the base flange-and-groove mount that the lens has, or figuring out what mount the flange attachment converts to.
The base flange mount doesn’t correspond to any mount system I’ve heard of – it’s not a T/T2 mount and I’m pretty sure it’s not an early Tokina M47 mount (although I’ve read that the Tele-Lentar lenses were made by Tokina). Beyond that I have no clue.
The flange attachment converts to what looks like a fairly common 3-blade bayonet that looks a lot like a Nikon F or Pentax K mount, but isn’t either one – I’ve tried both converters, and they don’t even remotely work. Oddly, a Pentax K end cap fits nicely on it, but that probably just indicates that the diameter of the bayonet blades are similar.
Here’s some pics – please help if you can (:
In the Manual Focus Forums, I found a helpful *text* guide that fairly clearly describes various lens mounts:
Exakta: 3 identical sized lugs w/o cuts in them. rather small mount, lug/screw on “flat”, auto lenses have “arm” with shutter release.
Konica: 3 lugs with cut in center of widest lug. No levers.
Minolta: 3 lugs, cut on right side of one lug that is opposite the one lever. (rod?)
Nikon: 3 lugs, aperutre lever just inside one lug. Cut/detent on opposite side of lens from that lug. famous “ears” on all older lenses, this is good for 90% of Nikon ID.
Olympus: 3 lugs, lever just inside one lug with 2 release buttons on opposite side of the lens.
P/K: 3 lugs, long leveer just inside one lug and detent by that lug.
Y/C: 3 lugs, 2 levers, smallest lever by lug with cut in it. Often an adjustable tab on rear.