Mike wrote:
<<I have a SB-28 mounted on my N90s as a master strobe. I have another
SB-28 attached to a SU-4 as a slave. If I set flash comp on the master
to -1.5 am I correct in assuming that the slave will follow the comp
setting of the master regardless of what might be set on the slave?>>
I haven't been able to purchase an SU-4 yet because of lack of
availability, so I'm speaking here from what I've read, not experienced.
The SU-4 works very simply. It recognizes the bright light from master
flash when it is fired and tells the slave to fire as well. Then it
recognizes that the master has stopped emitting light and instantly
tells the slave to cut off too.
Camera-mounted flashes determine the amount of light that hits the
subject by the duration of time they emit light. Therefore, if you
compensate light on your master (or the camera as the case may be) what
you're actually doing is shortening the length of time the flash will
emit light. Yes, since the slave, governed by the SU-4 will follow suit,
you are correct that the slave will also be adjusted for compensation.
Richard
