JIS B 7217:1974 English Edition

Method for determining various functions of projection lenses

Abstract

This Japanese Industrial Standard specifies the method for determining the focal length, effective aperture, aperture ratio, F number, vignetting factor, effective vignetting factor chromatic aberration, resolving power, runout of optical axis, distorsion, and brilliancy of projection lenses, hereinafter referred to as the "lenses".

Details

Note
We will send the latest version to you, please contact us if you want the exact document as the title. Some old Standards are in scancopy and no reaffirmed stamp