The reason for this is that you’re literally cropping out a portion of the scene and only keeping the very center of the composition. For instance, if you photograph the same exact scene with the same lens on a full-frame sensor camera, a crop sensor camera, and a micro four thirds camera, you’ll lose more of the scene as you shift from a larger sensor to a smaller one. Why Is Crop Factor Important?Ĭrop factor is important because it indicates how much of your image will be cropped when taking the photo. Your camera’s crop factor can also influence the depth of field and how sharp the focus is in your photographs. As a result, while a full-frame camera has a 1x crop factor and most APS-C cameras have a 1.5x or 1.6x crop factor, some compact cameras can have up to a 2.7x crop factor. The smaller the camera’s sensor, the greater the magnification factor.
When you use the same lens with both a full-frame camera and a camera with a smaller, cropped sensor, your images taken with the smaller-sensor camera result in a cropped field of view. The effects of crop factor are most noticeable when looking at a lens’ equivalent focal length. What is Crop Factor?Ĭrop factor or magnification factor refers to the diagonal measurement of a camera’s sensor size when compared to the diagonal measurement of a traditional 35mm frame of film. Micro four thirds cameras have it 2x so their sensors are 2 times smaller than a 35mm frame. Crop-sensor cameras (like most hobbyist models on the market) have a 1.6x or 1.5x onen, so the sensor is 1.6 or 1.5 times smaller than a 35mm film frame. Each digital camera has a crop-factor, meaning the size difference of the sensor in relation to a 35mm film frame.įull-frame cameras have a crop factor of 1x, so their sensors are the same size as 35mm film.
So when the first digital SLRs were designed, their sensors were modeled after 35mm film cameras. While film cameras were available in a variety of film sizes and formats (like 4×5 or 8×10), the masses most commonly gravitated toward using 35mm. Image via Shutterstock Crop Factor Started with 35mm
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