The seller says you'll never see this lens again, it's the Schneider Aero-Xenotar 2,8/150 with mount for the Rolleiflex SL 66, the lens was made for extreme sharpness on infinity, Schneider manufactured three prototypes only, it seems it was very expensive for series production (there is an English text after the German text), but I still think the never seen Planar 2/120 is the rarest lens for the SL 66: http://tiny.cc/4fn8kw 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