About Photography Crop Calculator
Determine exact equivalent focal lengths and equivalent apertures for matching field of view and depth-of-field background blur across camera sensors.
Key Capabilities & Features
- Two-way sensor equivalency: field of view equivalent focal length and equivalent aperture
- Accounts for depth-of-field background blur equivalency between sensor sizes
- Supports Full Frame, APS-C Canon, APS-C Sony/Nikon/Fuji, Micro 4/3, Medium Format, and Smartphones
- Instant one-click copy of equivalent lens specifications
How to Use Photography Crop Calculator
Enter Source Lens
Input your current lens focal length and aperture.
Select Source & Target Sensors
Pick your source camera format and target sensor format.
Read Equivalent Specs
View the exact lens focal length and f-stop required on the target sensor for identical photos.
Privacy & In-Browser Execution Guarantee
100% client-side calculation. Your data stays private in your browser.
Frequently Asked Questions
Why does crop factor affect aperture equivalency?
While f/1.8 delivers the same light intensity per square millimeter on any sensor, it produces shallower depth of field on larger sensors. To get the same total background blur as a Full Frame f/2.8, an APS-C lens must shoot at f/1.8.
Does a crop sensor make a telephoto lens zoom further?
No, it simply crops out the outer edges of the image circle, giving the visual appearance of a narrower, more magnified field of view.