The Fidelity Calumet Digital Shutter Tester allows you to test the shutters on a variety of cameras and lenses. If you like to precisely control exposure and you acquire equipment from others, it's nice to know how close you are to the correct speed.

It has been a pleasant surprise to find out that for most of my equipment, the shutters are quite close to their proper speeds - even old mechanical shutters from the 1920's and 1930's. They just don't make them like they used to... or do they ?