Glossary
Exposure value
Also called: EV
A single number that describes how much light a scene has.
Think of EV as the scene's brightness in one number, independent of how you expose it. EV 0 is f/1 at 1 second on ISO 100. Add a stop of light, add 1 EV. Sunny daylight lands at EV 15. A lamp-lit room sits around EV 5 to 7. It's useful precisely because it doesn't care whether you shoot f/2 at 1/500 or f/11 at 1/15, same scene is still the same EV. The meter shows a live EV at the top of the viewfinder.
