![]() ![]() The viewing lens is always wide open, maintaining viewing brightness.ģ. Pros and Cons of medium format roll film TLRsġ.The viewing/focusing image remains fully visible before, during and after the exposure.Ģ. The goal: guiding film shooters toward the best choices for getting into medium format film photography. Here we’ll concentrate on user-collector 2-1/4 x 2-1/4 roll film TLRs of the ‘40s though the ‘70s-everything but Rolleiflexes, Rolleicords, and Mamiyaflexes which certainly deserve articles of their own which will be forthcoming. ![]() Scores of fascinating TLRs were produced from the 1890s through the 1930s but it wasn’t until Franke & Heidecke of Braunschweig, Germany brought for the original Rolleiflex of 1929 that the 6圆 cm (2-1.4 x 2-1/4 inch) roll film TLR became the dominant form. The TLR’s viewing image is right-side-up, which makes it a lot easier to compose the picture than viewing an upside-down image on a typical view camera screen. The picture-taking lens, typically placed below the viewing lens, projects the image onto the film or sensor when the shutter fires or the lens is uncapped. It reflects the viewing image upward onto a focusing screen that’s perpendicular to the lens axis, so the waist-level or chest-level viewing image is right-side up, but laterally reversed. ![]() The word “reflex” refers to the mirror placed at a 45° angle behind the viewing lens. ![]() Both lenses are the same focal length, both are carefully calibrated so their focus points match, and both move in and out simultaneously (typically on a common lens board) as you focus the camera. Part 1Ħ Cool Non-Interchangeable-Lens TLRs That Aren’t Made By Rollei or MamiyaĪ twin lens reflex (TLR) is a camera that uses one lens for viewing and focusing the image and a second separate lens to take the picture. The Unvarnished Truth About 2-1/4 x 2-1/4 Twin Lens Reflexes. ![]()
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January 2023
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