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Member Since 26 Sep 2006
Offline Last Active Feb 28 2014 07:49 PM

Topics I've Started

Cave Photography, multiple strobes

24 February 2014 - 12:26 PM

I am headed to a very limited access cave (i.e. I likely won't ever be going back) in a few weeks and will be doing my first cave photography (maybe).


I haven't been there before, there are very few images of the cave to see what I'm in for, photography is not the primary objective and I'll have 7 dives at the max, and more likely only 3, that I'll be able to shoot.


So odds stacked against me from the get go, I'm looking for some advise.


I have a Nikon d7000 with  2 z240's on board (triggered via fiber optic), one ikelite DS125 with EV controller and two Nikonos 105's.


I've figured out that I can trip the 105's  (no pre-flash option) if I set the camera internal flash to manual, and if I set the EV controller correctly, it will fire the DS125 properly with out a pre-flash as well. Super excited about all that.


However, while testing the z240's with the camera in manual flash mode, I'm not getting any variation in power from changing the settings on the back of the strobe; full, manual at 1, manual at 11, auto, sttl.. all the same output. And I just checked, camera exposure is in manual as well. I also tried changing the flash setting in camera from full to 1/128th, no change. It all works fine if the camera is set to TTL.


Anybody with ideas on the manual settings?


I also have two Sola video2000's that I could use rather than the NIkonos strobes if they put out enough light. I could put the camera back in TTL and solve my Inon problem that way.


And come to think of it, will TTL even work in a cave? I'll probably end up setting the camera and adjusting the strobes manually anyway.