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135 film. The film is 35 mm (1.4 in) wide. Each image is 24×36 mm in the most common "small film" format (sometimes called "double-frame" for its relationship to the "single-frame" 35 mm movie format or full frame after the introduction of 135 sized digital sensors; confusingly, "full frame" was also used to describe the full gate of the movie format half the size).
Barnack tried various types of lenses, trying to find the best quality images. At the time, lenses for existing 35mm cameras covered the 18×24 mm frame format, so the larger Leica frame size was only partially covered. Existing Leitz and competing Zeiss lenses were either too large for the camera or would not cover the 24x36 frame.
The first full-frame DSLR cameras were developed in Japan from around 2000 to 2002: the MZ-D by Pentax, [26] the N Digital by Contax's Japanese R6D team, [27] and the EOS-1Ds by Canon. [28] Nikon has designated its full frame cameras as FX format and its smaller sensor interchangeable-lens camera formats as DX and CX.
Barnack resorted to a Leitz Mikro-Summar 1:4.5/42 mm lens for the prototype, but to achieve resolution necessary for satisfactory enlargement, the 24x36 mm format needed a lens designed specially for it. The first Leica lens was a 50 mm f /3.5 design based on the Cooke triplet of 1893, adapted by Max Berek at Leitz. The lens has five elements ...
Featuring a 13.89 Megapixel (4560 x 3048 pixels total) full frame 24 x 36 mm CMOS sensor, the DCS Pro 14n was the second full-frame digital SLR to reach the market, after the unsuccessful and short lived Contax N Digital and came one day before the successful Canon EOS-1Ds.
The lens has a variable diaphragm from f/3.5 to f/16. The lens has antireflective coating. This lens casts a 24mm image circle on a 24x36mm frame. It occupies only part of frame 24x36 and fits in a small side of a frame with a small cutting along the edges. The geometric centers of the image and the frame coincide.