Crop Factor Calculator
Sensor Crop Factor
Calculate crop factor from sensor presets
Custom Sensor Size
Enter a custom sensor width to calculate crop factor
Formula
Crop Factor = 36mm / Sensor Width | Equivalent FL = Actual FL × Crop Factor | FOV = 2 × atan(sensor width / (2 × focal length))
Frequently Asked Questions
What is crop factor?
Crop factor is the ratio of a full-frame sensor (36x24mm) to a smaller sensor. APS-C has a 1.5x crop factor, meaning a 50mm lens has the same field of view as a 75mm lens on full frame.
Does crop factor affect aperture?
Crop factor doesn't change the actual aperture, but it affects the equivalent depth of field. A 50mm f/1.8 on APS-C gives equivalent DOF to a 75mm f/2.7 on full frame.
What is the crop factor for Micro Four Thirds?
Micro Four Thirds has a 2x crop factor. A 25mm lens on M4/3 gives the same field of view as a 50mm lens on full frame.
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