GB 8347-1987

Methods of measurement for effective aperture and relative aperture of photographic lenses

STANDARD published on 1.1.1987

English, Chinese -
electronic design (pdf) (526.80 USD)

The information about the standard:

Designation standards: GB 8347-1987
Note: WITHDRAWN
Publication date standards: 1.1.1987
Country: Chinese technical standard
Category: Technical standards GB