Crop Factor & 35 mm Equivalents

How to Use the Crop Factor & 35mm Equivalent Tool

1. Select your camera sensor format. Choose from presets such as Full Frame (1.0×), APS-C (1.5× / 1.6×), Micro Four Thirds (2.0×), Super 35, or enter custom sensor dimensions.
2. Enter your lens focal length (mm). Type in the focal length marked on your lens (e.g., 24mm, 50mm, 85mm).
3. (Optional) Enter aperture (f-stop). The tool will show the equivalent depth-of-field characteristics on full-frame.
4. Click Calculate. The tool will display:
   • The effective focal length (35mm full-frame equivalent).
   • The field of view comparison between your sensor and full-frame.
   • The equivalent aperture for depth of field (useful when comparing formats).
5. (Optional) Compare multiple lenses side-by-side to see how they behave across different sensor sizes.

Tip: Crop factor does not change the physical focal length of your lens — it changes the field of view. A 50mm lens is always a 50mm, but on an APS-C sensor (1.5× crop), it gives the same field of view as a 75mm lens on full-frame.