6XC

Field of View & Crop Factor Calculator

Angle of view, full-frame equivalent focal length, and how much scene fits in frame at any distance — for every sensor size.

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Field of View and Crop Factor

A lens's angle of view depends on focal length and sensor size: angle = 2 × atan(sensor dimension ÷ 2f). Smaller sensors crop the image circle, which is expressed as the crop factor: a 35 mm lens on APS-C (×1.5) frames like about 53 mm on full frame. The calculator also answers the practical question — how many meters of scene fit in frame at a given distance (scene width = distance × sensor width ÷ focal length).

Frequently Asked Questions

What does a 50 mm lens see on APS-C?

With a ×1.5 crop it frames like a 75 mm on full frame — about 27° horizontal instead of 40°. That is why 35 mm is the popular "normal" choice on APS-C.

How much scene fits at 10 m with a 35 mm lens (full frame)?

Width = 10 × 36 ÷ 35 ≈ 10.3 m, and about 6.9 m high — handy for planning group shots and interviews.

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