When it comes to simple photography hacks, few are as useful and clever in the field as this one, presented by 34-year wedding photography veteran Frank Donnino.
When shooting on-location, Donnino always carries around a small, 25mm marble. By holding it up between his thumb and pointer finger, he can quickly determine how to best to face his subjects for maximum (or minimum) catch-light in their eyes.
Give the three-minute video a watch and be prepared to be impressed by just how much a small, otherwise unexceptional piece of gear can do for you.
(via ISO 1200)