ShutterDoc: Shutter Speed Test

Measure what your film camera's shutter is actually doing. ShutterDoc measures shutter speeds in ordinary room light, handheld up to 1/60. Take the lens off, open the back, point the phone into the mount and fire. A run from 1/30 to 1/500 on an SLR, three firings a speed, takes about two minutes. A test roll costs you the film, the developing and a fortnight of waiting, and still leaves you guessing which speed was off. You can also detect shutter capping for speeds up to 1/1000th of a…