GB/T 13987-1992
Determination of flash guide numbers for electronic photoflash equipment (English Version)

Standard No.

GB/T 13987-1992

Language

Chinese, Available in English version

Release Date

1992

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 13987-1992

Scope

This standard specifies the definition, calculation formula and expression method of the guide number of electronic flash devices for photography. This standard applies to electronic flash devices for photography, and also to disposable photographic flash bulbs with integral reflectors

GB/T 13987-1992 history

• 1992 GB/T 13987-1992 Determination of flash guide numbers for electronic photoflash equipment