ah - typo me... it' not a 2,8/180 Xenotar, it's a Tele Xenar - maybe I find out the differences sometime... In http://photo.net/large-format-photography-forum/00LJX7 they discussed the " Use of Schneider f2.8/150 Xenotar lens" for some more confusing details... Uwe 2012/9/26 CarlosMFreaza <cmfreaza@xxxxxxxxx> > 2012/9/26 Vick Ko <vick.ko@xxxxxxxxxxxx>: > > wow, so, is it true? Only three in existence? > > The 150/2.8 Xenotar is common in LF circles > > Is it the same formula? > > In fact the lens prototype looks pretty similar regarding the LF > 2,8/150 Xenotar , except for the lack of a real shutter since the SL66 > has the FP shutter, however the prototype couldn't have the same > formula exactly because it is a lens with special correction for > aerial photography, the 2,8/150 Xenotar is the fastest or one of the > fastest lens for LF. > > 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 > > -- Uwe Wolfgang Steinke