I have a Canon 10D...... and shootr2 is right about the1/ 200th sync with the internal flash.....But from my reading the manual... external flashes sync at 1/60th ( which is odd) I have been shooting at 1/90th without any problems useing my Vivatar 285 flash.....and I think it will go up to 1/200th as the internal flash does....I will have to experiment more
Charlie G
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