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What is APEX (additive system of photographic exposure)?
- https://photo.stackexchange.com/questions/91007/what-is-apex-additive-system-of-photographic-exposure
- APEX—The Additive System of Photographic Exposure is explained in detail by an abstract written by: Douglas A. Kerr Issue 7 August 4, 2007 ABSTRACT The Additive System of Photographic Exposure (APEX) provides for stating several factors involved in photographic exposure in logarithmic form.
APEX The Additive System of Photographic Exposure
- https://docplayer.net/21412390-Apex-the-additive-system-of-photographic-exposure.html
- 8 APEX The Additive System for Photographic Exposure Page 8 The fundamental equation for correct exposure based on incident illuminance is: t C = (5) 2 N E S i where t is the exposure time in seconds; N is the aperture, as an F-number; Ei is the average illuminance incident on the scene (in some appropriate unit); S is the speed (sensitivity ...
APEX—The Additive System of Photographic Exposure
- http://blackmilk.fr/download/APEX.pdf
- APEX—The Additive System for Photographic Exposure Page 3 It is customary for the tables showing the APEX forms of the various factors to cover the range of integer “value” from 0 through 10 or so. Values outside that range may of course occur. Negative and fractional values are perfectly workable. THE APEX EXPOSURE FACTORS The numbers
Additive Photographic Exposure System (APES)
- https://www.photonstophotos.net/GeneralTopics/Exposure/APES.htm
- Additive Photographic Exposure System (APES) Revised 2015-09-27 by Bill Claff APES Theory The formulas for the EV terms are: Note that my definitions of EV B and EV S differ from the “standard” formulas. The “standard” formulas use 3.125 as an approximation for π so that EV S values for common ISO arithmetic film speeds are whole numbers.
Douglas A. Kerr. APEX-The Additive System of Photographic …
- https://sciarium.com/file/153562/
- The Additive System of Photographic Exposure APEX provides for stating several factors involved in photographic exposure in logarithmic form. In this way, calculation of the proper exposure for a given situation may be done manually using only addition. Although the importance of that has...
APEX (photo)
- https://clever-geek.imtqy.com/articles/6057852/index.html
- APEX, Apex - Additive system for determining exposure ( Eng. Additive system of Photographic Exposure), proposed in the United States in 1960 to simplify the calculation of exposure parameters when photographing [1]. The ASA PH2.5-1960 standard provided for a special sensitivity scale designed for use with the system.
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- https://www.apexadditive.org/
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Exif data and EV calculation - Digital Photography Review
- https://www.dpreview.com/forums/post/4675324
- I am under the impression that the APEX values need to be added to compute Exposure Value. APEX Values for Aperture: (these values may be different for EXIF Standards 2.2) 0 = aperture 1 1 = aperture 1.4 2 = aperture 2 3 = aperture 2.8 4 = aperture 4 5 = aperture 5.6 6 = aperture 8 7 = aperture 11 8 = aperture 16 9 = aperture 22 10 = aperture 32
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