| Model 4RF 410 & 411 March 1931 - December 1932 Serials: 135.000 - 145.100
Taking Lens: Model 411: Zeiss Jena Tessar 3,5/60 Model 412: Zeiss Jena Tessar 2,8/60 Both with push-on filter 28.5mm. Finder lens: Heidoscop Anastigmat 2,8/60mm Shutter: Compur, 1 - 1/300 sec., T & B. Film: 4x4, Type 127. Film Transportation: winding lever with red window for first exposure on back of camera, counter window for exposures 2-12. Blank film pressure plate. Dimensions: 11.3x7.5x7.9cm. Weight: 580 grams. Aperture and shutter times engraved below and above taking lens.Model 4RF 413 & 414 (pictured) January 1933 - November 1934 Serials: 150.000 - 154.999
Taking Lens: Model 413: Zeiss Jena Tessar 3,5/60 Model 414: Zeiss Jena Tessar 2,8/60 Both with push-on filter 28.5mm. Finder lens: Heidoscop Anastigmat 2,8/60mm Shutter: Compur, 1 - 1/300 sec., T & B. Film: 4x4, Type 127. Film Transportation: winding lever with red window for first exposure on back of camera, counter window for exposures 2-12. Blank film pressure plate. Dimensions: 10.7x7.0x7.5cm. Weight: Model 413: 517 grams, model 414: 558 grams. Aperture and shutter times engraved left & right of taking lens. New window above the finder lens to view speed and aperture settings. | Model 4RF 420, 421, 422 & 423 December 1934 - May 1938 Serials: 155.000 - 523.000
Taking Lens: Model 420 & 422: Zeiss Jena Tessar 3,5/60 Model 421 & 423: Zeiss Jena Tessar 2,8/60 Both with push-on filter 28.5mm. Finder lens: Heidoscop Anastigmat 2,8/60mm Shutter: Models 420 & 421: Compur Rapid, 1 - 1/500 sec., T & B. End sequence 1/100, 1/300, 1/500. Models 422 & 423: Compur Rapid (like the 6X6 Rolleiflex Automat), 1 - 1/500 sec., T & B. End sequence 1/100, 1/200, 1/500. Film: 4x4, Type 127. Film Transportation: winding lever with red window for first exposure on back of camera, counter window for exposures 2-12. Blank film pressure plate. Dimensions: 10.7x7.0x7.5cm. Weight: Model 420 & 422: 567 grams, model 421 & 423: 583 grams. New Compur Rapid shutter. Aperture and shutter times engraved left and right of taking lens. Window above the finder lens to view speed and aperture settings. Models after 1935 have a slightly larger focusing knob.Models from 1931-1934 have no exposure guide on the back, and none of all models can be moderni |