GlenCalc

Field of view calculator

A smaller sensor sees a narrower view with the same lens; the crop factor converts to the full-frame lens with the same view.

Your answer

Horizontal angle54.4 °
Full-frame equivalent35 mm
Vertical angle37.8 °
Diagonal angle63.4 °
Crop factor1
Width covered at that distance20.6 ft

Worked out in your browser. Nothing you type is sent to a server.

How we worked it out

Updated as you change the numbers.

  1. Angle = 2 × arctan(sensor dimension ÷ (2 × focal length)). Crop factor = 43.27 mm ÷ sensor diagonal.

Method and assumptions

For a lens focused far away, angle of view depends only on the sensor dimension and the focal length. Close focusing narrows it slightly.

Questions

What is the full-frame equivalent of a 35 mm lens on APS-C?

About 54 mm (crop factor 1.53).

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

Embed this calculator on your site

Free to use. Paste this where you want the calculator; it runs in your visitors’ browsers, sets no cookies and sends nothing to us.

Related calculators