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Photographic sensitivity


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#1 Robert Houllahan

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Posted 10 June 2008 - 01:02 AM

How would stocks like xx19 or eterna fit into a comparison of broadly spectrally sensitive medium? Are devices like a liquid cooled scientific or spy satellite CCD or Cmos sensor(s) more sensitive over a range of spectra than an emulsion like xx19 which seems to about as broadly sensitive to light as anything made. Understanding a "gain" boost from the A/D on a sensor or a post gain and noise floor acceleration and reciprocity failure.

-Rob-
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#2 K Borowski

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Posted 10 June 2008 - 03:07 PM

Well, natively, digital and film are different animals, with silver halide crystals having peak sensitivity in the Ultraviolet-Blue region of the light and digital sensors having a native sensitivity at the red-infrared end of the spectrum. They crystals/sensors have to be modified with dyes or filtered to closer approximate the visible characteristics of the human eye.
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