Carlos, you are unbelievable! You not only sent your VSL3 E from South America to FFS in Braunschweig, Germany, for full refurbishment, you are also enquiring data from Carl Zeiss and obtain a qualified answer in short time. And honestly, I am wondering that Zeiss has this data in hands. Dirk-Roger Schmitt -----Ursprüngliche Nachricht----- Von: rollei_list-bounce@xxxxxxxxxxxxx [mailto:rollei_list-bounce@xxxxxxxxxxxxx] Im Auftrag von CarlosMFreaza Gesendet: Dienstag, 9. September 2014 22:05 An: rollei_list@xxxxxxxxxxxxx Betreff: [rollei_list] Rollei 35 mm SLR Flange focal distance...Now Carl Zeiss answer direct to me: I asked the Rollei SL35 flange issue to Carl Zeiss Camera Lenses directly, this is the answer I received a few minutes ago: "Ihre Anfrage (Absender: cmfreaza@xxxxxxxxxxxx) vom 09.09.2014: "Dear Carlos Manuel, Thanks for your inquiry. According to our recordings, the standard flange focal distance of the vintage Rollei 35mm system (QBM) was 44.50mm. Of course, some lens types (especially telephoto lenses) were adjusted with a longer flange focal distance, to compensate material elongation due to extreme temperatures. For further details, please do not hesitate to contact us. With Best Regards Bertram Hönlinger Carl Zeiss AG Camera Lens Division Kundencenter / Customer Care Center / PHO-VC Kundensupport / Customer Support Bertram Hönlinger Carl-Zeiss-Straße 22 - 73447 Oberkochen Telefon/Phone: +49 7364 20-6175 Fax: +49 7364 20-4045 Email: bertram.hoenlinger@xxxxxxxxx http://www.zeiss.de/photo Carl Zeiss AG Vorsitzender des Aufsichtsrates: Dr. Dieter Kurz Vorstand: Dr. Michael Kaschke (Vorsitzender), Dr. Hermann Gerlinger, Dr. Ludwin Monz, Thomas Spitzenpfeil Sitz der Gesellschaft: Oberkochen, Deutschland Amtsgericht Ulm, HRB 501 555, USt-IdNr: DE 811 119940" ______________________________________________ 2014-09-09 16:27 GMT-03:00 CarlosMFreaza <cmfreaza@xxxxxxxxx>: > I forgot Prochnow's Rollei Technical Report book yesterday, I found > this info for the Rolleiflex SL35 (page 3-225): > > " 4. Adjust and check infinity- setting and optical axis (with gaugue > and on collimator). > Plane measurement and optical axis measured with gaugue L-8613: 44,67 > + 0,02mm . Note: Measured from lens contact surface of bayonet ring to > the pressure plate-plane" > > "Focusing screen Plane measured with collimator > 44,50 +/- 00,3mm = 0 +/- 3 graduations (75/80 scale)" > > I add that the figures from "0" are for the Rollei collimator > > And then both figures 44,67mm and 44,50mm are used for the Rolleiflex > SL35 cameras optical adjustment, the first one for the lens register > and the second one for the focusing screeen plane. > > I think 44,67mm is the figure to keep in mind for a QBM lens adapter > to a non QBM camera. > > Carlos > > > > 2014-09-09 15:32 GMT-03:00 CarlosMFreaza <cmfreaza@xxxxxxxxx>: >>> Perhaps it would be necessary to clarify if Dirk needs the back >>>focal distance, 44,50mm to assure a right focus for the QBM lenses >>>with the adapter for Canon, or if the mechanical distance 44,67mm is >>>enough to assure it or if both distances are the same for practical >>>purposes. >>> Carl Zeiss confirmed as flange distance for the QBM 44,50mm as I >>>wrote yesterday and they give the back lens distance to film in >>>their technical info, f.e. according the Planar 1.4/50 Contax >>>/Yashica technical sheet the lens back distance "to film" is 45,50mm >>>(there are no technical sheets on line for QBM lenses). >>>Carlos >> >> This is the Contax/Yashica mount Planar 1.4/50 lens technical sheet, >> it could give an idea baout the way Carl Zeiss measures the 44.50mm >> for the QBM: >> >> http://www.zeiss.com/content/dam/Photography/new/pdf/en/downloadcente >> r/contax_yashica/planar1-4_50mm_yashica_e.pdf >> >> Carlos --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list