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Wratten number - HandWiki
- https://handwiki.org/wiki/Wratten_number#:~:text=Wratten%20numbers%20are%20a%20labeling%20system%20for%20optical,comprising%20a%20number%20sometimes%20followed%20by%20a%20letter.
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Wratten number - HandWiki
- https://handwiki.org/wiki/Wratten_number
- Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter. The number denotes the color of the filter, but is arbitrary and does not encode any information (the 80A–80D are blue, the next filters in numerical order, 81A–81EF, are orange); letters almost always increase with increasing …
Wratten Number - Reference Table - LiquiSearch
- https://www.liquisearch.com/wratten_number/reference_table
- 74 rows
Wratten Numbers - Equipment (No astrophotography) - Cloudy …
- https://www.cloudynights.com/topic/757039-wratten-numbers/
- Those are "Wratten" numbers. "They are named for the founder of the first photography company, British inventor Frederick Wratten. Wratten and partner C.E.K. Mees sold their company to Eastman Kodak in 1912, and Kodak started manufacturing Wratten filters." https://en.wikipedia.org/wiki/Wratten_number
Working with Wratten Filters and Infrared Photography
- https://joefarace.com/working-with-wratten-filters-and-infrared-photography/
- Sometimes colored on-camera filters are referred to by their Wratten numbers. The English firm of Wratten & Wainwright introduced the Wratten system in their 1909 book The Photography Of Coloured Objects. Established in the 1877, the company primarily made photographic plates and chemicals and in the 1880s and ’90s started producing cameras.
KODAK WRATTEN 2 Filters
- https://www.kodak.com/en/motion/page/wratten-2-filters
- World-class WRATTEN 2 Optical Filters are a must-have for photographers, cinematographers, engineers, and scientists who require analytical consistency for their realistic and creative effects/applications. WRATTEN 2 Optical Filters provide ease of use. They are less sensitive to humidity, less prone to static cling.
film - Can I measure the Wratten Number of a Filter?
- https://photo.stackexchange.com/questions/52469/can-i-measure-the-wratten-number-of-a-filter
- 1 Answer1. Show activity on this post. They probably don't correspond to Wratten numbers at all. The experimentally-derived filter factor for the red filter, for instance, is 2, whereas the filter factor for a #25 is 5, so there's an extra stop and a third of light coming from somewhere, and that somewhere is probably in the shorter wavelengths.
Wratten filter numbers? | Photrio.com Photography Forums
- https://www.photrio.com/forum/threads/wratten-filter-numbers.517/
- Feb 9, 2003. #2. The filter numbers that are typically used for contrast control are as follows: Yellow #8 and #15 (will darken blue in gray tone reproduction) Yellow green #11 and #13 (will darken blue in gray tone reproduction) Green #58 (will darken red tones in gray tone reproduction) Cyan #44 (Will darken orange tones in gray tone ...
Finding the Wratten number of some filters : photography
- https://www.reddit.com/r/photography/comments/4a105s/finding_the_wratten_number_of_some_filters/
- Hi. I have a bunch of old soviet filters like this one and I'm trying to find out more about their spectrum. The only data I have is what's written on them (colour and what I presume to be the factor - like Y-2 x or O-2.8 x).Any ideas?
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