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Author Message   Charlie Tinkerer Username: Charlie Post Number: 117 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Saturday, December 01, 2007 - 07:14 pm:    Rick Oleson's writeup (http://rick_oleson.tripod.com/index-77.html) says the viewing lens is f3.2. I think most TLRs have a larger viewing lens to give less depth of field in the viewing lens to ensure sharp focus of the taking lens without having to spend big bucks to match the two lenses.