Understand the concept of exposure triangle with this interactive online tool ...

MICHAEL ZHANG, PETAPIXEL:

"Understanding the exposure triangle of shutter speed, aperture, and ISO is one of the first steps in learning photography. To help people wrap their heads around the concept, photographer Tony Catalano has created the Interactive Exposure Tool, an online tool for experimenting with how changing camera settings affects the resulting photo of a scene."

Learn more, here.