I've calibrated shutter speeds up to 1/15th by recording the sound of the shutter on my computer. Each speed for each lens is in a separate file. I then import the files into Microsoft Movie Maker (comes standard on most newer computers). This allows me to see on screen the open and close point. It also shows the points on a timeline. You can zoom in on the time line to get a pretty accurate read up to 1/15th. Any faster would require an audio program that allows you to zoom in on a much shorter time scale. Anyone know of a software package that would work?
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