burkphoto wrote:
It's more useful as a construct of the digital realm. Generally, in the film world, we had two variables (time and aperture) and one constant (ISO or ASA sensitivity, or artificial push-pull Exposure Index). Digital introduces the option to much more easily vary the sensitivity by ramping up the gain and reducing the dynamic range, color depth, and signal-to-noise ratio of the digitized signal.
I always thought the triangle was a bit dubious, because it leaves out the most important variable: LIGHT. It assumes a fixed amount of it, and only deals with the relationships among aperture, time, and sensitivity. Yet the intensity, spectral quality, direction(s), ratio(s) of sources, scene brightness range, specularity, and shadow-edge acuteness all interplay with the exposure.
It's more useful as a construct of the digital rea... (
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Burkphoto, do you think people like what digital looks like because that has become all they know? A great film photo exceeded our expectations by artful science, while digital exceeds by scientific art. "I can do everything with digital, and much, much more," can be true, with mastery of software and a truly artistic eye or spirit; but isn't the digital venue designed to make everything look like postcard sharpness, without so much old-time effort? To deviate from the Oz look takes effort--the processing "filters" are hit and miss. Just as the postcard look of a scene required a certain amount of taking control of the light, so getting away from that look requires a reverse engineering of light. The ability to do everything with digital images may rest largely on our choice to do what digital pictures do. My own skill in digital processing is nowhere approaching my skills in film cameras and film darkroom (which in itself was humble)--I can spot them, take out power lines, increase or decrease overall contrast, adjust a sort of sharpness, brightness, and hue.
Here is one comparison for me:
When I shot film, 35mm was good enough for color (especially Kodachrome); but for b/w, 35mm was only good enough for capturing-the-moment pictures. Medium format was a revelation, and large format the promised land.
But when I shoot digital, the cropped sensor is good enough for color; but for b/w, the color digital (converted to b/w) is not good enough when printed on paper. (On a screen, it is fine, because the eye does not expect so much on a screen.)
So I dream of a Leica Monochrome--maybe there are others, but I would like to see if it does for b/w what film does in deep, rich blacks, etc., on paper prints. I don't think there is a medium format monochrome digital...
You could reduce Kodachrome harshness (if you wanted to) by many devices--fill light, reflectors, lower contrast paper, or cameras and lenses with a healthy flare in them, etc. With digital, we go to the contrast control, but this is quite limited if the image is not crisp enough (or too crisp) at the start. You don't have those controls very much in the camera itself, as you did with film.