Crop Factor Crop factor, also known as focal length multiplier or lens magnification factor, is a numerical value that describes the ratio of the image sensor size in a digital camera to the standard 35mm film frame. It affects the field of view and effective focal length of lenses when used on cameras with different sensor sizes.
Cameras with smaller sensors have a higher crop factor, resulting in a narrower field of view and effectively increasing the apparent focal length of lenses. For example, a lens with a focal length of 50mm on a camera with a crop factor of 1.5x will have an effective focal length of 75mm. Crop factor is an important consideration for photographers when choosing lenses, as it affects perspective, depth of field, and framing of images. |