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A 50 mm (focal length) lens on an APS-C image sensor format (crop factor 1.6) images a slightly smaller field of view than a 70 mm lens on a 35 mm sensor format camera (full frame sensor). A 80 mm lens (1.6 × 50 mm = 80 mm) with a full frame camera gives the same field of view as this 50 mm lens and APS-C sensor format combination produces.
Because the image sensors in many digital cameras are smaller than the 24 mm × 36 mm image area of full-frame 35 mm cameras, a lens of a given focal length gives a narrower field of view in such cameras. Sensor size is often expressed as optical format in inches. Other measures are also used; see table of sensor formats and sizes below.
35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...
The yellow line shows an example where 18 mm focal length on the 3:2 APS-C image sensor format (1.5 crop factor) is equivalent to 27 mm as the 35 mm format-equivalent focal length (27 mm = 18 mm * 1.5) and yields a vertical angle of 48 degrees.
Sensor size Crop factor Focal length [a] Aperture Pixel count Weight EVF Release year Availability Leica Q3 43 Full frame: 1.0 43mm f / 2.0 60 MP 772g Yes 2024 Current [1] Leica Q3: Full frame: 1.0 28mm f / 1.7 60 MP 743g Yes 2023 Current [2] Leica Q2: Full frame: 1.0 28mm f / 1.7 47 MP 734g Yes 2019 Discontinued [3] Leica Q / Q-P: Full frame ...
The latest Leica Leitz and Sharp Aquos R series phones do qualify because, despite using only 94% [b] of their 1.0-type sensors [2] [3] (with 4:3 aspect ratio), they maintain the same crop factor (2.7) and diagonal (1″) as a 1.0-type sensor with 3:2 aspect ratio, since that is the image circle for which their lenses were originally designed.
The latter values are referred to as the crop factor, field-of-view crop factor, focal-length multiplier, or format factor. On a 2× crop factor camera, for instance, a 50 mm lens produces the same field of view as a 100 mm lens used on a 35 mm film camera, and can typically be handheld at 1 ⁄ 100 second.
Focal length: 16-300mm: Focal length (35mm equiv.) ... The Tamron 16-300mm F/3.5-6.3 Di II VC PZD MACRO is a superzoom lens designed for digital crop sensor cameras ...