Quick reminder: the Exposure triangle concept is WRONG

Started 6 months ago | Discussions thread
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io_bg Senior Member • Posts: 1,784
Quick reminder: the Exposure triangle concept is WRONG

Hi all,

First, excuse me for the clickbait-y title. The below is not Fuji-specific, but I think it's a bit emphasized in the Fuji community due to the fact many bodies feature an ISO dial.

I keep noticing that many people have fallen for the exposure triangle idea - and time ago I had, too. However, it's good to be reminded that exposure means the amount of light reaching your sensor. This light is filtered through your lens' aperture and then again by your camera's shutter. Only these 2 components define the light hitting your sensor, ISO is not a part of the equation.

When I saw this video some time ago I had an aha! moment. Sure, it's long (almost 30 minutes) but I encourage you to check it out when you have some spare time.


There are probably other shorter explanations, but John P. Hess is a very good tutor and has some great videos on his channel. It's usually video-oriented, but many principles apply to photography as well.

Happy shooting!

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