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NAPM IT3.110 : 0

Withdrawn
Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

PHOTOGRAPHY - APERTURES AND RELATED PROPERTIES PERTAINING TO PHOTOGRAPHIC LENSES - DESIGNATIONS AND MEASUREMENTS
Available format(s)

Hardcopy

Withdrawn date

07-23-2013

Language(s)

English

Publisher

National Association of Photographic Manufacturers, Inc.

Foreword
1 Scope
2 Definitions
3 Aperture markings
4 Tolerances for f-numbers for photographic lenses
5 Methods for measuring effective entrance pupil and
    focal length
TABLES
1 F-number series
2 Tolerances of measured f-numbers
FIGURES
1 Focal length of a photographic lens
2 Schematic layout of telecentric projection system
    apparatus
3 Schematic layout of apparatus for measuring the focal
    length (Method 1)
4 Schematic layout of apparatus for measuring the focal
    length (Method 2)

Defines related properties of photographic lenses affecting the illuminance at the center of the image. Specifying all types of lenses in still cameras, with tolerances for stop numbers. Includes entrance pupil, relative aperture, focal length, aperture stop, giving methods for determinations and measurements.

DevelopmentNote
Revision and redesignation of ANSI PH3.29-1979(R1989)
DocumentType
Standard
Pages
16
PublisherName
National Association of Photographic Manufacturers, Inc.
Status
Withdrawn
Supersedes

View more information
Hardcopy - English

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