Who Believes the Exposure Triangle??

In most descriptions, I stop reading as soon as it says:- "ISO sets sensor sensitivity" (my emphasis) ...

... it does not do so and I've never seen proof that it does.

Although with digital cameras the Exposure Triangle doesn't apply as it used to for film, I still think it relevant in that it contains concepts that are useful, especially if only relying on ooc jpegs.

It’s sort of easy,..

We know that the more total light that reaches your sensor, the less the noise you’ll have in your image.
The total light of an exposure is only effected by aperture and shutter speed

General Exposure process:
1) Start with Base ISO

2) Now make your two creative decisions :
-Choose and set the lowest F number (and the appropriate focal distance) that will give you your desired FOV
-Choose and set the slowest shutter speed that will still give you your desired protection against movement blur (or set some other preferred “creative” shutter speed)

3)
- If the brightness of the image is now too low with these “creative settings”, you can raise the ISO to increase the brightness, making sure that any desired highlights do not clip too much.
...on the other hand,
- If the brightness of the image is too high and highlights are clipped, then you need to find a way to reduce the amount of light coming in

Please note that if your sensor has a dual gain (e.g. the Nikon Z7 has a second stage gain that kicks in at ISO 400) and if you want/need to raise the ISO, then it’s usually worth choosing at least 400 (in this case)

This general exposure process will result in an image that meets your creative choices and has the lowest noise levels.

It may sound like a slow process but, with a little practice, it can be done very quickly. Using the live histogram on digital camera, like the Z7, is a possibility to easily see these results as you make the adjustments.

It is, IMO, largely a matter of personal choice if you want to call this an exposure “triangle” or not.
Just remember:
-Two things effect exposure
-Three things effect the “exposure + resulting brightness” of the image

Interesting how often Aptina-licensed dual-gain sensors are getting mentioned in this thread ...

And the more information.

The histogram is only going to show you a representation of the current JPEG settings though, not what the RAW file is capable of saving.

deleted and reposted.

not just relying on jpegs, in the studio i stream live hdmi to large monitors so i need to display close to correct exposure/ image brightness to the client as im shooting. iso also plays a big part in recording the exposure settings on paper for different styles of lighting. eg: shutter speed, aperture, iso and strobe output and physical location.

wait for 10 years and you will have variable gain sensors, we could have them now but companies are milking the system for as long as they can 😁

www.tucsen.com/learning/cmos-and-scmos-camera-gain-settings/

yes, indeed. With more "signal" in that information, the better the Signal to Noise ratio.

Yes, unfortunately true, but since we don't have live "RAW histograms", the live histogram is the best available tool.
It's also fairly easy to learn how much "headroom" is available for RAW highlights in a particular camera and sort of make appropriate small adjustments while taking the shot

Agreed ... assuming that "total light" is Hm which is the average lux-seconds at the sensor image plane.

Yep!

Two of my cameras are raw-only and send the camera ISO setting in metadata to the raw converter which brightens the converter's Review image accordingly.

Another misleading statement courtesy of AI ...

Nope ... yet again, the literature ignores basic optics to dumb down the Infamous Triangle for the punters.

Amplifying output signals from a sensor does not change it's sensitivity - so no proof there, sorry.

Ok, the exposure triangle is nonsense to those who understand how a sensor performs technically. The arguments are well known.

But it is useful to those just starting to approach photography as it helps the understand aperture and shutter speed. Sometimes when somebody is at the beginning of their photographic journey, some simplification is useful to get them over the first stage.

Might as well send it to the Dumpster then.

Well I got the chance here with this thread to show everyone my fantastic general exposure method ;-)

Sure, in practice it works. I work most of the time at base ISO and I the three parameters will give correctly exposed pictures, if I change speed or aperture.

Maybe it is time for an "Equivalence" thread too.