What is the exposure triangle?
But first, it helps to have a good understanding of exposure, which is the sum total of the three most important settings in all of photography: shutter speed, aperture, and ISO. Collectively, these form what is known as the exposure triangle.
How to adjust exposure on a camera?
For cameras that have a button, you will need to hold the button and rotate one of the thumb dials, or press it once and use the LCD screen to adjust the exposure value.
How does a camera meter work?
Since camera meters work by evaluating light reflect ed off subjects and are standardized on middle gray (also known as 18% gray), any time a camera is pointed at something very dark, the meter will work the opposite way by brightening up the exposure, whereas a very bright subject will cause the meter to darken the exposure.
Where is the exposure compensation button on a Canon DSLR?
If you are using a Nikon DSLR, it will most likely be a button near the shutter release of the camera: If you are using a Canon DSLR, there might be an “AV” button on the back of the camera:
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