msilver2 0 Posted August 26, 2014 I posted this question yesterday, but the photos didn't come thru. Here's a second try. On my first dive trip with the Olympus E-M1 and the Nauticam housing, I had a problem using TTL. I think it showed up the most with medium distances using the 60mm macro lens. I was using two YS-01 strobes. I have some examples of the problem. All of these are shot with the mode dial on manual. The metering was center-weighted. Here’s a pair of flamingo tongues that were overexposed when shot at 1/320th and f6.3. My reaction was to drastically change the f stop, so exposure on the next shot was OK 1/320th at f 14.0: Same dive, here’s a toadfish overexposed when shot at 1/320th and f 8.0: Again, I stopped the camera down, and the next shot was OK at 1/320th and f 14.0: Here’s a shot that had OK exposure at 1/160th at f 6.3: But then the very next shot (different subject), is way over-exposed when also shot at 1/160th at f 6.3: The same scene is better exposed after drastic changes to the shutter speed and aperture, this time 1/320th at f13.0: Any ideas what I was doing wrong? Could I have had the flash setting on “full” rather than “fill”? Would that explain this? Share this post Link to post Share on other sites
Gudge 59 Posted August 26, 2014 What make/model strobes are you using? If they are Inon this will help explain the correct settings: http://reefphoto.com/kb.php?id=7 In short for your camera and Inon Z240 strobe(s): Camera flash set to fill. Left hand dial on strobe set to sTTL Right hand dial on strobe set so it is putting up to B ACC switch enabled (out) Share this post Link to post Share on other sites
msilver2 0 Posted August 26, 2014 it's two YS-01 strobes. Share this post Link to post Share on other sites
Aliens 3 Posted August 26, 2014 Have you tried manual flash instead? Or tried s-TTL low? Share this post Link to post Share on other sites
Gudge 59 Posted August 26, 2014 it's two YS-01 strobes. In that case: Camera flash set to Fill Set the strobe mode switch to [TTL] Set the strobe light level control dial to [FULL] Should do the trick. Share this post Link to post Share on other sites
bvanant 195 Posted August 26, 2014 (edited) There has been some trouble with the EM-1 and getting S&S strobes to work well in STTL. In my hands, I can get it to work for a shot or two then not work. Trying to figure it out without a lot of luck. That being said, something is wrong with the OP photos. Bill Edited August 26, 2014 by bvanant Share this post Link to post Share on other sites