Around 1990, Kodacolor Gold 100ASA print film and a manual camera, competing with a dozen GWCs at a group shoot. You can hear their lenses hunting as they try and focus on her breasts but you've a nicer shot in mind. Wait for your turn by getting stable, composing the shot, focusing and when her eye contact finally arrives, wait for the flash heads to "beep" they've recycled and instantly grab the shot before she moves on to the next guy.