Of all the cameras I have, I didn't own a 6x9. My wife and I are traveling for a belated 35th wedding anniversary to Rome and Tuscany Italy in a month. I felt the need to add to the arsenal of cameras that I will be taking there. I think this will serve me well for the shots of the country side. This is a Zeiss Ikon Nettar 4.5 105mm Schneider Radionar that I picked up for $17.50 USD. It's pretty clean with decent glass and a good working shutter. The Zeiss folders have good build quality and unlike the poor Agfa Isolettes, bellows made out of something better than plasticized paper.
Hm, I don't think it's a Nettar. Looks more as a Kamera Werkstatte model to me. Prontor-S rim shutter, so minimal age 1932-ish; so Zeiss Ikon? No, at that time they didn't employ Schneider-Kreuznach lenses... If foreign (like Novar, Dominar etc.) those companies were not allowed to have their name on the lenses. (like all rules, there are exceptions, like the Schneider lenses on the postwar Ikonta, due to supply shortage)
Looking more closer, the focal distance is 105mm, and a triangle quality sign, must be post-war... A Trona?
Looks like KW, (Dresden), stamp on the strut, nothing wrong with the brand to be completely usable, the Radionar is a capable three element lens, just a bit soft at full aperture, and likes to be set to F8. Check the bellows are light tight, higher film speeds these days will find any holes. I have an Adox,(West German, rather than East), with the same lens, and shots are very good, especially the colour quality from the large negative.
Thanks Stephen! I've heard that you have to be careful with 6x9's when opening. If you do so too quickly, you can suck in the film. Most of my shots with this type of camera will be outdoors using 200 ASA black and white film. That should keep me in the sweet spot aperture-wise.
Film in 6x9 is rarely flat anyway, the full open performance problems of many 120 roll film cameras may be down to this rather than the lens. Sudden opening is unlikely to cause a problem if you wind on before use, rather than after taking a shot.
Kodak use to list it as a potential problem in their reference book of faults. Stephen.