I bought a Vivitar 500/8 at a yard sale for $25 and used it a bit. Had T mount, so used T to Leica R adapter. Worked from a technical point of view. Terribly soft pictures, however. Used it for fun a few times then got rid of it. But it was a fun experiment. Aram -------------------------------------------------- From: "Robert Lilley" <speyerdom@xxxxxxx> Sent: Tuesday, August 10, 2010 7:54 PM To: <leicareflex@xxxxxxxxxxxxx> Subject: [LRflex] Maksutov-Cassegrain on R4 > I've got a Russian KMZ (Soviet) made f:8 500mm MTO Maksutov-Cassegrain > lens I thought I would put in front of my R4 just for kicks. Yea, yea, I > know about bokeh donuts and all that - this is for fun, not for serious. > I've got a M39 to Leica R adaptor coming in from China as I write this. > This 1950's circa MTO is threaded for M39. I'm not sure I'll get infinity > focus - but, oh well, it's my only telephoto till I can afford something > nice and Leitz. > > So... Here is my goofy question. As the lens does not have f stops, I > assume I use the camera in (m) manual mode and match up the speed with... > f:8 - right? The lens comes with a neutral density filter I could use in > place of smaller stops if needed. Anybody ever done this before? > > Rob > ------ > Unsubscribe or change to/from Digest Mode at: > http://www.lrflex.furnfeather.net/ > Archives are at: > //www.freelists.org/archives/leicareflex/ > ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/