KS B 5421-1981
Method for determining various functions of projection lenses

Standard No.

KS B 5421-1981

Release Date

1981

Published By

Korean Agency for Technology and Standards (KATS)

Status

Be replaced

Replace By

KS B 5421-1981(2016)

Latest

KS B 5421-2021

Scope

This standard specifies the focal length, effective aperture, aperture ratio, F number, aperture efficiency, and effective aperture efficiency of the projection lens.

KS B 5421-1981 history

• 2021 KS B 5421-2021 Method for determining various functions of projection lenses
• 0000 KS B 5421-1981(2016)
• 1981 KS B 5421-1981 Method for determining various functions of projection lenses