The Rolleiflex 3.5B had a Tessar and was Bay 1; The Rolleiflex 3.5C had a Planar and was Bay 2 but the outer Bayonets on this all but touched each other and the knurled wheels too, making changing EV difficult. After that F&H increased the lens spacing to compensate for the larger Bay 2 mounts. There are two Mutars for the 3.5 cameras for that reason. Off hand I cannot remember if it is about 1mm or 2mm difference. If the Planar has to be Bay 2, possibly because of front element diameter, then the whole front of the 'T' would have to be rebuilt around a 3.5 Bay 2 front plate. What the lens spacing is on a 'T' I do not know; however, this camera has a 'T' front plate which looks unmodified. John On 11 Jul 2013, at 20:51, Sven Keller <keller.schaefer@xxxxxxxxxxxxx> wrote: > The 3.5 Planars and the T both had size 00 shutters, so from that it would > work, regardless of the bayonet size. > > I still believe this is a later modification. When the T and the 3.5 > Rolleiflexes went out of production (1976 according to Prochnow), things at > Rollei were still in good order, so Rollei would just not have done this, I > believe. > > Regards, > > Sven > --- 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