You need a shutter speed tester, and luckily for us, [Stuart Brown] has one. There are no sharks involved in this build, but it does rely on laser diodes as a light source.

The Phochron XA Film camera shutter speed tester has been designed to offer a quick and accurate handheld tester that displays both numerical timing and a scope-like waveform.

When the shutter on the camera is released, the shutter speed can be measured and displayed on the OLED screen. An Arduino naturally handles all the computational duties.

Kevin Kadooka has this month finished his Lux open source camera that he has been working on, with a goal of building a fully-fledged camera, using just easily purchased off-the-shelf components ...