richard, i'm pretty sure kodak's dialytes were always f/7.7 lenses. but i'm not aware they offered them in smaller than large format focal lengths. jerry, your example just might be one though it seems more likely that it's a triplet. allan, your lens is almost certainly a triplet. --- 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