GB/T 13987-2025 Active National standards

GB/T 13987-2025 Determination of flash guide numbers for electronic photoflash equipment

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 13987-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Cameras and photographic equipment

ICS Name: Photographic equipment, projectors

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Pages: 16 pages

Scope

This document defines the terms and definitions of the flash index of electronic flash devices, and specifies the calculation formula and representation method of the flash index.
This document does not include the definition of the light output of electronic flash devices and the measurement methods described in ISO 2827.
This document is applicable to the measurement of the flash index of electronic flash devices used in photography.