![]() ![]() ![]() However:Įarly Panchromatic films were, however, still much too sensitive to blue light (what resulted e.g. "Panchromatic" film arrived later - in this, the sensitivity was extended into the red range.The first B&W film was sensitive in the near-UV through green: this is why such film could be developed by (dim) red light (ditto for photographic paper - but since that was exposed with "white" light through a B&W negative, the spectral sensitivity mattered much less).Some of the facts from that article (do read the original): This is described in some detail in this article which in turn borrows a lot from Ansel Adams' book "The Negative". When taking a black and white photograph, it is not uncommon to use a yellow filter to make clouds "pop" more in an outdoor picture (just as you might use a red filter to reduce the appearance of skin blemishes in a portrait photo).Īside from that, the sensitivity of film varies - from the "panchromatic" film that tries to be "color neutral", to all kinds of other formulations that (de)emphasize some colors over others.
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