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Old 12th April 2019
Jim Ford Jim Ford is offline
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Re: Monochrome raw files

Originally Posted by Wreckdiver View Post
Raw files are exactly what comes off the sensor, which includes colour. If any processing takes place then the result is either a TIFF or JPEG.
Colour data is not recorded as such by the camera sensor - just shades of grey. The photosites are exposed through a matrix of coloured filters - red green and blue *. Colour is interpreted later in either the camera processor or computer raw processor. eg if say photosite 200 across and 100 down received 50% exposure through a green filter then the processing software will subsequently interpret the data as being 50% green.

* Twice as many green filters as blue or red, because our eyes are most sensitive to green. I guess this is because we evolved in a 'green world' where we needed to distinguish potential predators from the surrounding vegetation.

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