Exposure control in a raw developer: misnomer?

Started Jan 30, 2013 | Discussions thread
Detail Man
Detail Man Forum Pro • Posts: 16,681
Re: Exposure control in a raw developer: misnomer?

dosdan wrote:

As I understand it, the "Exposure Triangle" is composed of Scene Luminance, Shutter Speed, Aperture (or should that be "F-number"?). These 3 alone determine the number of photons captured by the sensor.

ISO Sensitivity plays a role in the rendered brightness of the outputted image. (As well as helping to mitigate the contribution to the total read noise of the ADC noise floor in most cameras.)

So, I take the phrase "exposing a shot" to refer to the capturing process, not the rendering process. With in-camera JPEG, these two processes are combined. When shooting raw, the development process is separated and postponed.

But most raw development programs have an "Exposure" adjustment control. But isn't this adjusting the brightness of the rendered output? If so, it has nothing to do with exposure and is a misnomer.

So what should this control be labelled? "Rendered Brightness"?

What about a suitable term for the combined capturing & rendering process, that doesn't confuse it with exposing?

But Dan, that would make sense...

It seems that (on these forums, anyway) it is by far more the exception than the rule when the distinction between Exposure:



... and Image Brightness is understood. Further, there seems to exist a common tremendous intertial farce that (despite the definition of Exposure being cited) opposes letting go of the very common misnomer (which seeks to include an ISO rating, and relates only to camera settings themselves, as opposed to including Scene Luminance).

That (technically incorrect) usage of the phrase Exposure Value (EV) with reference to camera settings only is so widespread that camera companies play along, as well. For an example of that ...

... see this post: http://forums.dpreview.com/forums/post/50618520

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