What is crop factor?

Crop Factor

In digital photography, a crop factor is related to the ratio of the dimensions of a camera's imaging area compared to a reference format; most often, this term is applied to digital cameras, relative to 35 mm film format as a reference. In the case of digital cameras, the imaging device would be a digital sensor. The most commonly used definition of crop factor is the ratio of a 35 mm frame's diagonal (43.3 mm) to the diagonal of the image sensor in question; that is, CF=diag35mm / diagsensor. Given the same 3:2 aspect ratio as 35mm's 36mm x 24mm area, this is equivalent to the ratio of heights or ratio of widths; the ratio of sensor areas is the square of the crop factor.

Read more about Crop Factor.

Some articles on crop factor:

Common Image Sensor Formats - Sensors Equipping Most DSLRs and Mirrorless Interchangeable-lens Cameras
... use relatively large sensors, either around the size of a frame of APS-C film, with a crop factor of 1.5-1.6 or 30% smaller than that, with a crop factor of 2.0 ... On September 2011, Nikon announced their new format CX, whose size is 1" (2.7 crop factor) ... Pentax Q, equipped with a 1/2.3" sensor (5.62 crop factor) ...
Image Sensor Format - Sensor Size and Depth of Field
... the f-number inversely in proportion to crop factor – a smaller f-number for smaller sensors ... The smaller sensor is then operating at a lower ISO setting, by the square of the crop factor.) And, we might compare the depth of field of sensors receiving the same photometric ... dimensions of the format, and thus is the relative crop factor between the sensors ...
Micro Four Thirds System - Advantages, Disadvantages and Other Factors - Disadvantages of Micro Four Thirds Compared With DSLRs
... The sensor is 35% smaller in area (2.0x crop factor) than APS-C (1.5x crop factor, or 1.6x for Canon-APS-C) sized sensors and 75% smaller (i.e ... a quarter of the area) than a full frame sensor (1.0x crop factor) (35 mm equivalent), which can mean lower image quality when all other variables are the same ... A larger crop factor (2x multiplier versus APS-C's 1.5x) means greater depth-of-field for the same equivalent field of view and f/stop when compared with APS-C and especially full frame cameras ...
Common Crop Factors
... Crop factor figures are useful in calculating 35 mm equivalent focal length and 35 mm equivalent magnification ... Some common crop factors are Type Height (mm) Crop factor 1/2.5" (Many Superzoom and point-and-shoot cameras) 4.29 5.6 1/2.3" (Compacts and Superzooms like Canon Powershot SX Series) 4.62 5.2 1/1.8" (High ...
Canon EF 200mm Lens - Crop Factor
... When used with a Canon APS-C (1.6x crop) DSLR camera or APS-H (1.3x crop), the field of view of this lens is similar to a 320mm or 260mm on full frame camera ... This is due to the crop factor inherent with APS-C or APS-H (crop) sensor digital SLR cameras ... for a cropped image rather than having to crop afterwards, thus utilizing parts of the sensor that would have otherwise been wasted ...

Famous quotes containing the words factor and/or crop:

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