Having a collection of secondhand TLRs, I have found that with some I can focus on the screen using the magnifier but others are all blurred. Obviously previous owners have changed the magnifier dioptre lens to suit their own eyesight. Unfortunately, there do not seem to be any markings on the lenses. Is there a way of testing to see what dioptre strength they are? Another question: is there a 'pool' of these lenses that one can make exchanges? Yours blurredly, John --- 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