Here is a copy of the manual for the Fidelity Calumet Digital Shutter Tester.
I purchased mine a few years ago, but I have lost the original manual. Here is a copy for you, in
case you lost yours. The document is 12 pages long.
The Shutter Tester allows you to test the shutters on a variety of cameras and lenses. If you
like to control the visual quality of your photos, and you acquire equipment from others, it's nice
to know how close you are to the correct speed. I have been surprised 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 ?