ANSI IT2.4-1987
Photography (Sensitometry) - Black-and- White Aerial Camera Films - Determination of IS0 Speed and Average Gradient ANSI/ISO 7829-1986; ANSI/NAPM IT2.4-1987

Standard No.

ANSI IT2.4-1987

Release Date

1987

Published By

American National Standards Institute （ANSI)

Latest

ANSI IT2.4-1987

Scope

This standard specifies the method for determining the ISO speed and ISO average gradient of black-and-white negative camera film-process combinations used in aerial photography.

ANSI IT2.4-1987 history

• 1987 ANSI IT2.4-1987 Photography (Sensitometry) - Black-and- White Aerial Camera Films - Determination of IS0 Speed and Average Gradient ANSI/ISO 7829-1986; ANSI/NAPM IT2.4-1987