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Can’t make a direct comparison, since I never got the Metabones adapter for Canon 60mm on Sony. My Canon body is a T4i, and I’ve had better results for blackwater AF with the a6600 + Zeiss 50mm. Pretty sure newer Canon bodies would improve AF significantly, but I don’t have direct experience with one. Lance

Just seeing this thread, so a little late to the game. I shoot a Zeiss 50mm on Sony a6600 body, and went through the same decision process. I already own the Canon 60mm lens, but got bogged down in picking an adapter + ports for Sony/Canon and went with the Zeiss 50mm instead after finding a pretty good deal on eBay. Overall, I'm happy with the lens. Guessing I've had it in blackwater on ~10 dives off south Florida and one in Indonesia. It does best in blackwater with lots of focus light and the aperture set to a pretty high number with high ISO, shutter around 1/125s. Not ideal compared to results I see from local Nikon+60mm shooters, but it does the job and is reasonably quick for focus with enough light (either red or white). A recent blackwater example is here. Looking at a possible upgrade to Canon R7 with 60mm macro to help with blackwater, but that's a different topic. I used this lens extensively on a recent trip to Indonesia, see this gallery for a variety of macro shots taken with it. I found it relatively easy to shoot normal macro subjects with it, especially compared to blackwater. One thing I haven't seen mentioned is using the Zeiss 50mm with wet optics. I found that a CMC-2 on a flip adapter was really useful to get in tighter where field of view was less of a concern, and it gave good results. Tried it out for the hell of it, and it's on my camera for any non-blackwater macro dives with that lens now. Hope this is helpful. Lance

Hi, Lance from southeast Florida USA checking in, glad to see this forum is up and running! I shoot a Sony a-6600 in Nauticam, moving to Retra strobes from S&S. Turn ons include: green vacuum status lights, clean o-rings, and curious octopus. Turn-offs include: YS-D2 strobes failures, bad viz, and waves too big for the boat to run. Looking forward to interacting with everyone here, Lance