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