equivalent focal length

British  

noun

1. optics the ratio of the size of an image of a small distant object near the optical axis to the angular distance of the object in radians

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Example Sentences

The telephoto camera remains exclusive to the 13 Pro phones, and Apple has increased its equivalent focal length to 77mm, or three times longer than the primary camera.

From The Verge

Only one rear camera, but it’s a big one The f/1.9 “Summicron” lens is also much wider than on other phones’ primary cameras, with an equivalent focal length of 19mm — that’s in ultrawide territory.

From The Verge

It starts with a gigantic 1/1.7-inch Exmor RS 12-megapixel sensor set behind a Zeiss lens at a 24mm equivalent focal length.

From The Verge

Combined, Fujifilm says this gives the SX800 a total equivalent focal length of 1000mm, which is enough to focus on a car’s license plate from 1km or roughly 0.6 miles away.

From The Verge

The camera’s 32mm equivalent focal length is wide enough that it’s hard to miss your target, even if you’re shooting blind, but isn’t so wide that it’s hard to make out what you were targeting.

From The Verge