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Hi All, I'm working to understand how my a6000 works in detail with the aim of (possibly) making my own LED TTL converter. At the moment I use the a6000 with its internal flash to trigger a set of YS-D2 strobes using my optical cables. I either use the strobes in manual or TTL mode. The TTL is reasonable, but not always perfect. I wanted to understand how the a6000 TTL system works, so I connected a little oscilloscope to my hotshoe x-sync pin and used the other channel of the oscilloscope with a photodiode to monitor the flash. See attached 2 screen grabs for two flash types - Fill Flash, Rear Sync. I also did a rear sync, but it's result was remarkably similar. I wasn't able, in any case, either Manual, Aperture priority or full automatic, to witness any pre-flash whatsoever from the camera's internal flash. Does the a6000 meter TTL during the exposure? Am I missing something here. Welcome any insights, comments or suggestions to be able to run another oscilloscope test. Cheers! -
I have the Nauticam NA-800 housing with a Nauticam 8.5" acrylic dome and I've been suffering some concerning internal reflections from the rig. I've read on here that most of the reflections that people are getting are a result of the internal flash "showing through" to the dome and reflecting. I'm using an Ikelite hotshot connection so that's an impossibility for my particular case. I didn't notice any other suggestions on the board which might be causing it other than strobe placement. I have tried moving the strobes both fore and aft of the dome and pointing them away. I still seem to get some portion of reflection. I was curious if there are any other factors that may be leading to this issue that I haven't thought of? Obviously everything in the dome is black in color so there isn't any white paint that could be causing them. I've attached a sample to illustrate the type of reflection I'm seeing. I also notice this type of reflection when aiming the camera into the sun. Obviously it's something to do with light reflecting from an outside source. I've only used a Nikon 16-35mm f/4 lens on the camera with the dome so that could be a partial cause/effect of the reflections. I have a UV filter on the front as well. In the meantime, one quick-fix I could do is shoot in DX mode which would effectively crop most of the reflection out...but of course I did not buy the D800E to shoot it in crop mode. :-) Thanks for your help! -Andy
