SU800 vrs SB900
Is the any advantage of using the SU800 to trigger remote flash as opposed to just using an SB900 as the trigger?
I normally run with pocket wizards but they are not working with the D4 very well and until they are updates was just thinking of the best work around. I already have several SB900 but would need to buy a SU800 - but if it is a lot better it may be worth it.
Also when using the SB900 as a controller the flash still fires - does anyone know if the is a way of turning this off? I'm presuming no!
The flash has to fire to set of the IR pulse to trigger other flashes.
Therefore the downside is if you have a 'blinker' for a subject you run the risk of many shots with closed eyes :/
Upside is you can use the on board 900 for a bit of fill-in if you so wish
Light is Light, its what you do with it that counts
Turn the onboard flash to "--" in the commander menu to remove it's contribution (except at very close range or High ISO where it's noticeable) or use FP Sync and shutter speeds over 1/320th if you need to eliminate it altogether.
Firing flashes in manual mode or using fv/lock will reduce the possibility of getting the aforementioned blinkers. TTL seems to be the worst culprit there.
I never tried an SU800 so can't comment.
Oh - you may find that using a piece of exposed film to gel the onboard will reduce it's contribution and still allow IR communication.. It's something I've read about but not tried myself.