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2. Film speed - Wikipedia

   en.wikipedia.org/wiki/Film_speed

   Photography – Colour negative films for still photography – Determination of ISO speed (withdrawn). New York: American Standards Association. Superseded by ANSI IT2.27-1988. ANSI IT2.27-1988 (1994-08/09?). Photography Color negative films for still photography – Determination of ISO speed. New York: American National Standards Institute.

3. Guide number - Wikipedia

   en.wikipedia.org/wiki/Guide_number

   To allow photographers to properly calculate exposures, even older, base-model flash devices have at least a tabular table on the device showing its guide number for a limited range of common ISO sensitivities. Today, the state of the art has advanced so that with the exception of the least expensive models, virtually all modern on-camera flash ...

4. List of photographic films - Wikipedia

   en.wikipedia.org/wiki/List_of_photographic_films

   Modern panchromatic professional film using core-shell crystal technology for fast action and low light photography. An ISO 1000 film suitable for push processing to an E.I. of 3200 or higher. [100] UK: 135–36, 120 ILFORD: ORTHO PLUS: available/ *11/2019-T/P: 80D 40T: B&W: Print

5. Digital Photography Review - Wikipedia

   en.wikipedia.org/wiki/Digital_Photography_Review

   Digital Photography Review, also known as DPReview, is a website about digital cameras and digital photography, established in November 1998. [4] The website provides comprehensive reviews of digital cameras, [4] lenses and accessories, buying guides, [4] user reviews, [4] and forums for individual cameras, as well as general photography forums.

6. Exposure value - Wikipedia

   en.wikipedia.org/wiki/Exposure_value

   Illuminance is measured using a flat sensor; if the common value of C = 250 (unit: lux s ISO=lm s/m 2 ISO) is used, an EV of zero (e.g., an aperture of f /1 and a shutter time of 1 sec) for ISO = 100 corresponds to an illuminance of 2.5 lux (0.23 fc). At EV = 15 (the "sunny sixteen" amount of light) the illuminance is 82,000 lux (7600 fc). For ...

7. 30 Color Photos Photographers Took 100 Years Ago That Still ...

   www.aol.com/44-old-color-photos-showing...

   Image credits: Detroit Photograph Company Historians date the oldest photograph to 1826 France. At least that's the oldest one that we know of today. That's when Joseph Nicéphore Niépce started ...