Hi Chris You can't compare these two lenses.Your older 1,4/50 Rollei mount is a German produced lens; for the Japanese version the tolerances must be different, although they try to built it to the standards of Zeiss, but they probally can't match the German productionstandard.Other photographers have confirmed me that they are also aware of the tolerance problem of the Japanese factory . BTW; the ZE is made with a Canon mount, so your suggestion that it is an adapterproblem is not the case. It is/was no back focus problem. best herman That's not at all the experience I have with my Zeiss f/1.4 lenses: I have a 50mm f/1.4 (older Rolleflex mount, not HFT), but it's basically collecting dust because I don't especially like 50mm lenses, though I did try it out once and it was very good. The 35mm and 85mm f/1.4 lenses are two of my absolute favorites. Even my LTM Soviet copy of the 1933 50mm f/1.5 is excellent, even wide open. If Zeiss says the lens was in working order, then I'd seriously consider a camera/adapter/focusing alignment or collimation problem. Chris ----- Original Message ---- From: Herman Kempers <info@xxxxxxxxxxxxxxxxxxxxxxxxxxx> To: leicareflex@xxxxxxxxxxxxx Sent: Tue, April 13, 2010 10:47:09 AM Subject: [LRflex] Re: Bokeh (OT) Nice document, I wish they made their lens(es?) as good as this information sheet. Last year I bought the Zeiss Planar 1,4/50 ZE for my Canon 5dII. This lens is beautifull made, very solid, smooth focussing, very nice to work with. But it was not usable under the 5,6. <SNIP> ------ 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/