The crop factor can be calculated by dividing the diagonal length of the 35 mm camera sensor with the diagonal length of the camera sensor under consideration. This calculation is applicable for DSLR as well as mirrorless cameras. You can use our crop factor calculator or equivalent focal length calculator to understand what crop you will get by using a certain lens and camera sensor combination.Ĭrop factor calculator or equivalent focal length calculator is a simple tool which takes in to account the given sensor size in comparison with standard full frame sensor and then calculates the crop factor and equivalent focal length. Here is an example of a canon film lens used with various sensor sizes.Ĭrop sensor is a term commonly used for sensors smaller than full frame sensor. The same logic is also applicable for film cameras. Same lens ( Prime or Zoom) when used with different camera sensor types gives you different focal length equivalent images. The crop factor can be used to multiply the given focal length to calculate equivalent focal length. This is because the smaller the sensor the higher the focal length appears. The same factor is also known as focal length multiplier factor. The name crop comes from the fact that the image is “cropped in” compared to complete available image smaller sensors. The factor by which the given sensor is smaller or larger compared to a standard full frame sensor is known as crop factor. As you can see, a standard 35mm full frame sensor captures a wider image while a smaller crop sensor gives a narrower image and it appears to be zoomed in.īecause of this for a smaller sensor the image appears to be zoomed in or focal length is increased. The bigger the sensor the wider the image and the smaller the sensor the narrower the image.īelow image explains this phenomenon. The image formed by the sensor is circular in nature and the sensor captures a certain portion of this image. Traditionally film cameras were used for all photographic purposes and the traditional size of the film was 36mm x 24mm. The lens when fitted on camera captures the scene in-front and makes it available for the sensor to capture. In this article we will see in brief what is crop factor and introduce the crop factor calculator which you can download and use for your own purpose.Ĭrop factor is generally less than one but in some typical cases it can be less than 1 as well. If you are not sure about what is crop factor and how it affects your photos then you are bound to get confused. You will also here a lot of different numbers for this crop factor. With so many camera systems around you will see the term crop factor in many specifications, marketing literature, expert reviews. Crop factor calculator helps to calculate equivalent focal length for a given sensor when compared to focal length when used with a 35 mm sensor. Crop factor is a term used to compare any camera sensor with the traditional or more standard 35mm camera sensor.
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