Among SLR cameras, there are 120 camera and 135 camera, among which 120 and 135 are what?

In SLR cameras, 120 camera and 135 camera, where 120 and 135 refer to the film size.

135 means that the film frame is 36x wide and 24mm high.

120 refers to a camera using 120 film, with a width of 6 1.5mm and a length of 81.5-84 mm. There is also 135 film, which is a roll-shaped photosensitive film with holes punched on both sides and a height of 35 mm.

The lens focal length of 120 camera is different from that of 135 camera. Take 6 x 6 as an example: the standard mirror is 80mm, which is equal to 50mm of 135 camera. 50mm of 6 x 6 is equal to 28mm of 135 camera, and 645 150mm is equal to 90mm of 135 camera.

Extended data

The width of 120 film is fixed at 6cm, but the imaging area and the number of photos can be determined according to the size of the photosensitive area (working area) of the camera. For example, 6*4.5, you can shoot 16; 6*6, you can take 12; 6*4.5 and 6*6 are more common; 6*9 (Moscow 5, "Dinka people"), you can take 8 pictures; 6* 12, you can take 6 pictures; 6* 17 (Lin Hafu), you can take 4 pictures.

120 film has a large imaging area (36*24mm compared with 135 film) and a relatively fine image quality, so it can be suitable for landscape photography, commercial photography and other activities that require high image quality. In addition, personalized photography such as LOMO often uses 120 film.

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