The Deep Science Behind Camera Exposure and Metering

Most of us know about the exposure triangle, which dictates how shutter speed, aperture, and ISO balance each other to create the total exposure. But rarely if ever do we dive deep into what exposure really is at the fundamental level. This great video will give you a fun, scientific breakdown of exposure and metering.

Coming to you from Filmmaker IQ, this awesome video will teach you all the ins and outs of the math and physics behind exposure and metering. Of course, you'll never need to do raw exposure value calculations in your head (but I think it would be pretty cool if we had to), but if you're the type of person who likes to learn the theory behind something, this is the exact video for you. In it, you'll learn about concepts such as luminous flux and luminance, the exposure value (EV) system, which was developed to simply the calculations of shutter speed and aperture, and how your camera puts all this physics and math together to produce a properly exposed photograph. You'll also learn about reflected versus incident light meters and how the differences can throw off your own camera's own meter. Give the video above a watch for the full rundown. 

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3 Comments

Michael Yearout's picture

Alex: Excellent video. I really enjoyed delving deeper into exposure. Thanks for posting it.

John Skinner's picture

Felt like one of the courses I took back on the 80's at Rochester / Kodak.. except this guy had more personality.

An informative video. Back in the 80's, I found the EV formula; it wasn't easy since there was no Internet. I developed a program for the Hewlett-Packard HP-41 programmable calculator that calculated the EV given the ISO, shutter speed, and aperture. Once the EV was calculated, the aperture or shutter speed could be changed to get the other value. It also incorporated the Zone System. I just wish that my HP-41 calculators and the card reader still works.