Peter, No, it is a lens of different focal length, but if both are f3.5 they are generally of Tessar configuration, 4 elements. Page 13 of Pearlman's Rollei Manual, First Edition shows it. I'm sure that Richard can give you the exact design data and glass analysis. Jerry Peter J Nebergall wrote: > another dumb question: > > I have a Rolleicord with 3.5 Xenar, 75mm. I also have seen a # of 35mm > examples of this lens, most notable on German Kodaks (Retinas) where it > is often standard. Is this the same optic? > > P.J. Nebergall > > --- > 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 --- 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