2 strobes fired different times, long exposure

something i was wondering before i logged on and i am unable to do this at the moment.

if you have two flashes metered and setup to light a subject, will there be a difference in exposure if both flashes are fired at seperate times? say for example its a 2 second exposure, the first flash is fired immediately and the second flash is fired at 1second... how is this different than if both are fired at the same time?

If no camera or subject movement during exposure, then no difference.

Or, to get a stop more power from your strobes, fire them, let them recycle and fire again before the shutter closes. But this only works in a dark environment where the ambient won't overpower the exposure.

yes i should have specified this would be in a dark environment.
i learned the hard way how ambient light can change at the drop of a dime.

i did not know about firing twice to get a stop more power...thanks

jobv2 wrote in post #12709244
i did not know about firing twice to get a stop more power...thanks

You can fire the flash as many times as you can get away with to build up the exposure. The problem is ambient creeping in and movement between shots (both for the camera and the subject).

jobv2 wrote in post #12709244
yes i should have specified this would be in a dark environment.
i learned the hard way how ambient light can change at the drop of a dime.

i did not know about firing twice to get a stop more power...thanks

Each doubling of power is a geometric progression series...

1...2...4...8...16 gives you 0EV...1EV...2EV...3EV.​..4EV increase.