Carlos, thanks for the advice. My question was a bit different: I need to buy a set of Proxars while I am in Paris this week. Does anyone know of any dealers in Paris who might be likely to have set available for purchase? Best regards, Sanders McNew www.mcnew.net/flickr Carlos said: > If you look for "rolleiflex proxar" (there were Zeiss > Proxars for other cameras too) in the auction site, you'll find some > items. The original 28,5mm set was sold with the two identical pieces > for the taking and viewing lenses only, the Rolleipar (Rolleipar-Keil) > to compensate parallax was separately sold as accesory for the Proxar > set. Some users sold the set as second hand item including the > Rolleipar afterward, perhaps you find one of these sets, otherwise you > need to buy Proxar and Rolleipar separately.