Later other motion picture formats came about, such as Academy Ratio (22 x 16 mm), Widescreen (21.95 x 18.6 mm), Super 35 (24.89 x 18.66 mm) and Techiscope (22 x 9.47 mm). Only a format of 24 x 36mm is used for the photo on the film roll.ģ5mm film format was first used in 1892 by William Dickson and Thomas Edison for moving pictures with frames of 24 x 18mm, using film supplied by George Eastman (Kodak), and this became the international standard for motion picture negative film in 1909. See Focal length further down.ī) 35mm focal length: the distance from center of focus inside the lens to the focusing plane (the sensor or film) is 35mm.ģ5mm film format (also known as full-frame)Ĭ) 35mm film format (also known as full-frame in digital sensors) was a standard film format that came about in 1892 where the width of the film roll was 35mm, and it's been the most used format ever since. See Focal length and Aperture further down for more.Ī) 35mm lens is a lens that has a viewing angle of view is 63°vertically, 54° horizontally and 38° vertically within a 35mm film frame or 'full-frame' 24x36mm digital format. Newer designs with mirrors (in tele lenses) and more corrections (in wide lenses) can make the size of the lenses shorter or longer, but the distance from center of focus to sensor in a modern 50mm lens will still be 50mm for a 50mm and 400mm for a 400mm, and so on. In traditional lens design, one could usually tell from looking at the length of a lens if it was a 400mm, 100mm or 35mm. The writing of 1:2/50 is a tradition from the 1800's of specifying a lens, which reveals quite a bit about the construction:įocal length 50mm simply means that the distance from center of focus inside the lens to the focusing plane (the sensor or film) is 50mm, and the aperture of f/2 or 1:2 means that the diameter of the hole the light comes throught is 25mm (50mm divided with 2 = 25mm). On the lens to the right, it means that the diameter of the hole throught he lens is 25mm.Ī 50mm f/2.0 lens. This is the ongoing project of collecting the words used in photography and Leica.ġ: = Basically means 1 divided with.

Youtube magic lantern canon focus trap