Aqua-Andy
Contributor
I have been using one YS-01 for many year without issues. I added a second YS-01 and when both are set to TTL mode the images are all over exposed. I have tried each strobe individually and the images come out fine but if I try to use both the image is way over exposed. I'm using an Olympus TG-5. I'm not sure why but when I try taking a picture above water with both strobes it comes out fine, for some reason the issue only shows up under water. I have resorted to setting the strobes manually but I would like to use TTL.