i started working with a monolight off my 10d yesterday- i found that i could not get the shutter to sync properly above a speed of 250- is this normal? the light is a 20 yr old bogen. when i shot at that speed, i did get excellent results anyway, but shouldn't i be able to go faster? the fstop for that speed was around 9 or so (maybe a little higher, i can't remember exactly) so i had too much dof for a good portrait shot... i was shooting on iso 100 with focal length of about 85 mm on a 20-135 zoom... any ideas why this is happening? do i need to do something else to get the camera to sync up with the monolight?