P.S. I can't lay my hands on my 40 year old hardcover copy of 'The Human Figure in Motion' so I can't give you more precise answers The last time I looked at this book was 20-25 years ago (memory is the second thing to go, you know). I doupt that the shutter speeds were anything close to 1/6000th of a second, maybe 1/600th. In any case, photographic plates were not sensative enough in those days to re-act to such a short exposure. Walter