Every successful photo has three things in common, and they’re not particularly surprising. The proper aperture, exposure, and focusing distance? The right camera, lens, and tripod? Successful use of hyperfocal distance, ISO invariance, and ETTR? No! The three variables that matter the most in photography are simple: light, subject, and composition. 1. Light Photography is light. Without it, you couldn’t take pictures in the first place, let alone good ones. The quality of li