Initially I posted my question on this thread but it would probably deserve a dedicated discussion.
- Two Inon Z240 Type IV strobes, setup to be triggered via fiber optic cables (cables attached, working on previous Nauticam DSLR housing).
- Shooting fully in Manual mode, strobe outputs controlled manually via the strob knobs (not using TTL).
- Nikon D500 camera, in Nauticam housing. Because D500 doesn't have internal flash, Nauticam's new external flash triggering system is used, and connected to the D500 via a hot shoe. See here under section "External Flash Triggering" - i am NOT using the optional TTL circuitry, just the baseline one, which works in manual mode only.
Inons don't fire
My investigations so far:
- I am pretty sure the Inons are setup properly (i've switched from TTL shooting to Manual a while ago), and in fact i have been switching the fiber optics from the D500 housing to the D300s housing which i still have, and with the D300s Nauticam housing both strobes fire properly. So clearly the communication between NA-D500 housing and the Inons is not right.
- I made sure the NA-D500 emits a light signal: i unplugged the fiber optics and looked through the 2 "windows" and, surprise, they both emit a (strong) red light. So i confirmed the housing produces some light.
- Now i checked on the other end of the fiber optic cables (strobe side), and i do see the red light properly coming through the optical cable, so for me the fiber optic cables are fine - anyways they work perfectly with NA-D300s housing (triggered by the D300s' internal flash.
My theories/open question so far:
- is it normal that the Nauticam LED flash triggering system emits red light? As far as i know LEDs consume fewer power when emitting white/blueish light.
- are Inon Z240 type 4 strobes supposed to work with a red light when using fiber optics as a trigger? I would be surprised that this very popular strobe model isn't compatible with the new Nauticam LED flash triggering system, but i just don't know.
Can anybody help me figure out why it is not working, and how to fix this?
I believe the NA-D5 housing uses the exact same strobe triggering system, so maybe some D5 shooters could advice?
Some would say RTFM, but in fact the NA-D500 manual is still being written, that's one of the funny aspects of being a very early adopter