In a message dated 12/30/2005 8:01:05 PM Eastern Standard Time, kennybod@xxxxxxx writes: According to info posted on the Rollei Club website, there were a number of different models of the 2.8F produced: K7F, K7F2, etc. How are these different models identified, to my untrained eye? Thanks, Ken Good question. 12/24 capability for one?