Rob Brigham writes: > TTL extinguishes the flash when the required amount of light has entered > the lens. Thus the duration of the flash cannot be known in advance.
It is known to a certain extent, and it is definitely known to be much faster than the shutter speed. I have a Sunpak brochure here, and one of their big potato-mashers is 1/400th at full power and 1/30,000th at minimum output. Not sure about the big studio strobes though. Their light might last longer due to the greater energy output. Cheers, - Dave David A. Mann, B.E. (Elec) http://www.digistar.com/~dmann/ "Why is it that if an adult behaves like a child they lock him up, while children are allowed to run free on the streets?" -- Garfield - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
