Calculadora de Distância Focal Equivalente (35 mm)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
focal_equiv = focal × crop
About this calculator
The 35mm Equivalent Focal Length Calculator converts the actual focal length of a lens to its full-frame equivalent based on the sensor's crop factor. For example, a 50mm lens on an APS-C camera with a 1.5x crop factor equals 75mm in 35mm terms. This helps compare the field of view across different sensors.
The calculation is simple: multiply the actual focal length by the sensor's crop factor. The crop factor varies by sensor size: APS-C (1.5x or 1.6x), Micro Four Thirds (2x), medium format (0.79x), etc. The calculator allows manual input or selection from common presets.
Use this tool when planning compositions with different sensor cameras, buying lenses for a specific system, or simulating a full-frame lens's effect. It's helpful for photographers switching formats or wanting to understand their lens's actual angle of view.
Note: the crop factor does not affect depth of field or exposure; only the field of view is equivalent. Double-check your sensor's exact crop factor, as some models may vary slightly (e.g., Canon APS-C is 1.6x, Nikon/Sony APS-C is 1.5x).
Frequently asked questions
What is crop factor in cameras?
It is the ratio between the full-frame sensor size (36x24 mm) and your camera's sensor. An APS-C sensor has a 1.5x or 1.6x factor, meaning it is smaller than full frame, resulting in a narrower field of view for the same lens.
How do I find my camera's crop factor?
Check the manual or online specs. Canon APS-C uses 1.6x; Nikon, Sony, Fuji APS-C use 1.5x; Micro Four Thirds use 2x; medium format uses 0.79x. If unsure, search for your camera model.
Does equivalent focal length affect depth of field?
No. Depth of field depends on actual focal length, aperture, and distance to subject, not the crop factor. The equivalence is only for field of view.
Can I use this calculator for phone lenses?
Yes, if you know the phone sensor's crop factor. Many phones have small sensors with high factors (e.g., 5x or more). Enter the actual focal length (usually marked on the camera) and the crop factor.
What is the difference between actual and equivalent focal length?
Actual focal length is the lens's optical property (in mm). Equivalent is the value that would produce the same field of view on a full-frame camera. For example, a 50mm lens on APS-C equals 75mm on full frame.