> The coatings to which I refer are the > front outer element of the 2.8 Planar, which has a yellowish cast to > it. After about 1965, the front element has a sort of purple cast. Todd, my two 3.5 Planars seems to be the other way around. My 1st model 3.5F Planr is purple while the slightly later 3.5E3 is yellow. I always thought that the changed from purple to yellow. My first model 2.8F indeed has a yellowish front lens. Best regards, Siu Fai --- 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