NAPM IT3.110 : 0
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.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
Hardcopy
23-07-2013
English
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Withdrawn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 |
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