ShuttR: Shutter Speed Tester

Is your analogue camera's shutter still accurate — or has it drifted after decades of use? ShuttR Check measures the real shutter speeds of your analog camera using nothing but your iPhone's camera and a light source. No hardware testers, no sensors to buy, no guesswork — reliably from 8s down to 1/500. HOW IT WORKS Open your camera's film back, remove the lens, and put a light source behind it. ShuttR Check uses your iPhone's high-speed camera to measure exactly how long each shutter release lets light through, then tells you how far that is from the speed you dialled in — in fractions of a stop. The app walks you through every step. There is nothing to configure, nothing to interpret: set up, release the shutter, read the result. RELIABLE FROM 8s TO 1/500 — ShuttR Check measures dependably from 8 seconds down to 1/500. An iPhone alone cannot resolve 1/1000 and up with an accuracy…