Is it possible to remotely trigger the SU-800 on my D3 without making an exposure? I want to use my Sekonic 758DR to measure flash strength at the subject location. I have no problems doing this with my Pocket Wizards. Since I have the SU-800 as part of my R1C1 kit, I wanted to try it out as a quicker way to do a setup. The extra exposures aren't a big deal, I just like to minimize wasted shots.
The SU-800 does not have a radio receiver in it like the PocketWizard products do. Also the Nikon CLS Wireless system requires a series of preflashes before the exposure flash that the flash light meters can not adjust for. So one needs to use the FV lock on the camera to lock in the flash exposure and then use the light meter to record the full shutter release with the locked exposure settings.
I knew it didn't have a radio receiver. I was hoping for a wired connected at the least. You mention of the pre-flashes reminded me why I gave up on using the system some time ago. Now that I think about it, I believe the Sekonic has a mode to set it to capture a flash when it's fired within a given time period. If I put it on a light stand, I'd have time to get back to the camera. I'll look into the FV lock.
Sun 30-May-10 05:38 PM | edited Sun 30-May-10 05:40 PM by gkaiseril
You use FV lock to run the pre-flash sequences and set the necessary power for the remote and main units. Then you can start your flash meter and trigger the final shot. Only the triggering and recording of the shot will occur. No more pre-flashes. So the meter should only record the final trigger release action. So you record and set the required exposure and have a user delayed period before the final shot and only the final shot.
It's a minor irritation boiling down to having to delete the test shots. Like I said, minor problem.
I did try using the SU-800 in manual mode and noticed that I could only set it in full stops (e.g., 1/2, 1/4) whereas I can set one third stops at the flash (e.g., 1/2, 1/2 - 1/3 ev, 1/2 - 2/3 ev, 1/4). Am I missing an option to set thirds? The booklet that came with the R1C1 didn't indicate one that I could find.
If you want to control the remote Speedlights in Manual Flash mode via the SU-800 the only thing I can think of is to place the SU-800 in a PC to hotshoe adaptor with a Pocket Wizard Tranceiver attached via the PC port and see if it works. Good Luck and Enjoy your Nikons!