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There is way too much wrong with it.

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Reason: Lemmings are not overly bright.

Want the truth ? Avoid well worn paths.

Carbonman Loc: Vancouver BC

This is why I have the rear wheel set as the exposure compensation adjustment on all of my Olympus bodies. It makes quickly tuning the exposure a snap.

Canisdirus

Empty comment...as usual.

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There is everything wrong with it.
It doesnt take a 12 page UHH fiasco to reveal the obvious. But the herd mind is blind to anything simple and obvious.

flyboy61 Loc: The Great American Desert

Dodie;
Because I can, and it helps to make my photos better, and I need all the help I can get!

Canisdirus

More empty content...as usual.

R.G. Loc: Scotland

The subject being discussed in that post was controlled variables. How often is the brightness of the scene a controlled variable? In fact to be more specific the subject being discussed was in-camera controlled variables.

The first point I raised was the use of the term "exposure". Through common usage that term has come to be used in reference to the brightness of the resulting image. Who are we to say whether that's right or wrong? From a technical point of view, "exposure" refers to the amount of captured light, but that's relevant only so far as it affects the brightness of the resulting SOOC image.

petrochemist Loc: UK

Lighting is frequently a controlled variable. Outdoors it might mean waiting for a cloud to move, or sun set...
Indoors or with portraits/macro lighting is usually controllable by flash or by using reflectors/shades. If shooting sports the controllability of light is a very different matter.

As far as photography goes however it is a critical variable whether controllable or not. It determines the range of settings that are usable for the shot, in same way the lens & camera control the range of options for aperture & shutter speed.

Some of my lenses don't have adjustable apertures, and indeed there are old cameras with only a single shutter speed - is the fact you may not be able to control them any reason to rule out aperture/shutter speed as variables?

Three variables (controlled or not) interrelate to determine the actual amount of light reaching the film/sensor during the shot.

R.G. Loc: Scotland

For some reason the camera manufacturers have unanimously opted for having aperture, shutter speed and ISO as the three interrelated (and controlled) variables for achieving the desired exposure. The fact that they are inextricably interrelated lends further weight to the suggestion that ISO should be seen as one of the exposure variables. But as I said, the preferred meaning of the terminology depends on who is using it.

The exposure triangle provides the basis for controlling the exposure, and while flash, studio lighting etc provide a degree of control over the brightness of the scene being photographed, those situations are the exception rather than the rule. Why then would any camera manufacturer want to consider any option other than the exposure triangle for determining the camera's basic method of operation? And is any beginner going to benefit from being taught anything other than the exposure triangle?

Wallen Loc: Middle Earth

I had own cameras without any shutter & aperture adjustment. All I can do is wait for a good light or have a flash on. In essence, I can only adjust the light or what Film speed to use. That's why I invented the carboard box light meter. If that lightmeter shows 3 lines and i have an ASA 200 film, i'm good to shoot.

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There really is a triangle but no one on UHH ever notices. Hogsters are too busy parroting each other.

The three corners are Exposure, Illumination, and Sensitivity.

Over there at the Exposure corner, cameras provide two adjustable user controls, F/stop and Time.

Illumination can be found on hand, augmented or attenuated, or provided artificially.

Sensitivity is manipulated either electronically or chemically.

A change at any one corner requires a complementary change at either or both of the other corners.

This is plain as day. It doesnt come from bogus "educators" selling books, videos, and clicks ... and who are the source material for the UHH flock of parrots.

R.G. Loc: Scotland

You're not the first to mention that the brightness of a scene can change. I would describe that as stating the obvious. And how often is it a controllable variable? It seems a bit superfluous to mention things that are not examples of controlled exposure variables (which is the subject of the thread). In the interest of simplicity I think it would be a good idea to stick to the in-camera functions under discussion.

Your alternative triangle has technical interest and I note that your use of the term "exposure" is a reference to the amount of captured light, which is just one of the possible uses of that term. To avoid another round of cross-purposes and misunderstandings I'd like to point out that for many people, "exposure" refers to the brightness of the SOOC image and that is how they are used to thinking about it - which I find perfectly understandable. Tech-heads are entitled to their use of that term and camera users are entitled to their own use of that term. Calling either one right or wrong seems a bit superfluous.