focallength中文

Focal length is one of the two primary measurements of a camera lens. The other is the "aperture," which is the lens opening (see f-stop).

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Focal distancevsfocallength

A prime lens has one focal length and a fixed field of view. In order to change it, the photographer has to move closer or farther from the subject. A zoom lens has a range from wide angle (35mm or less) to telephoto (60mm or greater).

focallength是什么

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Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view."

A prime lens has one focal length and a fixed field of view. In order to change it, the photographer has to move closer or farther from the subject. A zoom lens has a range from wide angle (35mm or less) to telephoto (60mm or greater).

Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view."

Focallength

PCMag.com is a leading authority on technology, delivering lab-based, independent reviews of the latest products and services. Our expert industry analysis and practical solutions help you make better buying decisions and get more from technology.

Focal length is one of the two primary measurements of a camera lens. The other is the "aperture," which is the lens opening (see f-stop).