Repeating flash

Many of us have features we don't know how to use on our cameras and other gear.  This was an exercise to remedy that lack of knowledge for the repeating flash feature on a flashgun I own.  Featured is an operating 50 year old Seth Thomas mechanical metronome illuminated by a flash cycling at 8 times a second at 1/64th power for a one second exposure. You can see how the metronome arm slowed at the ends of it's arc before reversing, and there are eight images of the arm.  I needed this metronome when I took piano lessons long long ago!