Thanks Emmanuel, interesting info, since Rollei is using the 2.8F tooling to manufacture the GX/FX mechanical parts, it's not a surprise Monsieur Métrot comment. The GX changes to receive the Seiko shutters have nothing to do with the shutter size, they have to do with Seiko and Copal shutters speeds selector movement, Prochnow explains the details in the Rollei Report IV but I haven't read them yet because I recieved the book yesterday, anyway the changes are minimal and have relationship with the mechanism used to show the speeds and f stops in the viewing lens window.- All the best Carlos --- bigler@xxxxxxxx escribió: > There is one interesting feature that Gérard Métrot, > a skilled > parisian Rollei expert (Photo Suffren) told me. The > threads and > critical spacings to mount the lens on a pre-1981 > 2.8F camera perfecty > match the modern FX dimensions. In other words, if > you get a classical > 2.8F with a perfect body & mechanism but a > definitely ruined lens, you > can swap it for a new 2.8FX planar. The camera has > setting screws to > perfectly accommodate small differences in focal > lengths and > registration. > > My understanding is that critical dimensions of a #0 > synchro-compur > shutter as used in the classical pre-1981 Rollei 2.8 > TLR are identical > the #0 copal and the #0 seiko exactly like for a > view camera > shutter... since the Japanese shuttters, to the best > of my knowledge, > although not at all identical internally to the > Rollei 2.8 TLR #0 > synchro compur shutter, feature perfectly > interchangeable dimensions > for placing the iris and mounting lens elements > (thread and > front/back spacing). > > -- > Emmanuel BIGLER > <bigler@xxxxxxxx> > --- > 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 > > __________________________________________________ Correo Yahoo! Espacio para todos tus mensajes, antivirus y antispam ¡gratis! ¡Abrí tu cuenta ya! - http://correo.yahoo.com.ar --- 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