The Exposure Triangle Is Misleading And Unnecessary.

No mean hard-clipping response, but individual grains will only get photo-activated once, which is a sort of elemental clipping.

The same would happen with a one-bit digital sensor; you'd have a linear response right up to the point where the first photosite is hit twice, and can't change any further, and then as exposure continues, more and more photosites are hit and there are fewer and fewer that can still change.

I just did a simulation of a 100 kilopixel sensor that received 10,000 spatially random photons per frame in an animation, turning the canvas eventually from all-white to all-black, and it took about 120 frames before the last white pixel turned black. That means that it took about 12x the mean capacity of each frame to completely saturate it.

That depends on what you need. Room for surprise highlights? Minimal read noise? Two different needs, two different potential priorities.
This is not about MANDATES. This is about understanding the pros and cons of your options.

A grain being activated doesn't necessarily mean it will be developed, too ;)

You can't GAIN on photon noise, dark current noise, PRNU noise, or pre-gain read noise through amplification; they are baked into the original charges in the photosites. (PRNU noise has no relationship to exposure.)

Greater amplification can only gain on post-gain read noise or too low of a bit-depth in the digitization.

Pre-gain read noise can vary between low ISO settings and high ones, though, with dual conversion gain, but that is a difference in capacitance at the photosites..

Well, I meant doing everything "correctly" according to the triangle peddlers. That would include scene illumination. Just the three data points, Av, Tv, and ISO are meaningless without that, for getting an OOC JPEG with expected brightness.

Why BIF or action shooters set shutter speed to freeze motion, f/stop to desired DOF or wide opened and let auto ISO in camera to provide acceptable brightness of the image. Scenes illumination can change quite a bit but image brightness will be more or less the same. Noise is another story. In this scenario what else will affect image lightness?

School gives you some practice at learning things, which you can then apply to learning things that are not in the school curriculum.
I'm sure that shot noise wasn't in any curriculum that I experienced.

Don Cox

Don

Raw conversion and image processing.
For raw, ISO is undefined and it's effect on image lightness is undefined. Even the effect ISO setting has on image density vary.

What about JPEG?

I edit TIFFs and JPEGs routinely, including for midtone lightness.
I have absolutely no idea why lightness even enters the discussion, unless one wants to display images "as is".

I guess Sagittarius meant OOC Jpegs.

When you shoot actions or BIF how do you set your camera?

IliahBorg,

A recent thread on the old site was asking, “What drew you to DPReview”. I couldn’t remember so I looked at my posting history. One of my first introductions was getting sucked into an exposure triangle round and round that you were a part of. Good times.

It's in this thread, dprevived.com/t/the-exposure-triangle-is-misleading-and-unnecessary/1602/post/12588/

Call me simple but I agree. But this thread is more criticism against The Exposure Triangle Theory than telling to the beginner what ' exposure' means.
What beginner needs is a simple tutorial of what 'exposure' means and what is 'The correct' exposure.

What I've read a lot of people shoot JPEG not RAW especially when they need result immediately.

I don't offer unculled photos to my customers, and normally, for events, it takes me a few moments on top of careful culling to edit and crop those shots I selected. I guess "immediately" may be more often than not a figure of speech