Guide number
volume
British pronunciation/ɡˈaɪd nˈʌmbə/
American pronunciation/ɡˈaɪd nˈʌmbɚ/

Визначення та Значення "guide number"

Guide number
01

число направляючої

a measurement of a flash unit's power output and range, calculated by multiplying the distance between the flash and subject by the f-number of the camera's aperture setting

What is the "guide number"?

The guide number is a measure of a flash unit's power and its ability to illuminate a scene. It indicates the maximum distance at which the flash can effectively light a subject, given a specific aperture setting. The guide number is typically expressed in meters or feet and helps photographers determine the appropriate exposure settings for their shots. A higher guide number means the flash has greater power and can cover a larger area or reach subjects farther away. This measurement is useful for adjusting flash output and ensuring proper exposure in various lighting conditions.

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