Is anybody using focus stacking/bracketing underwater?

Hi, is someone here using this technics? For example with Olympus, Canon or the new Sony R5? Do you have good results? What has to take into account underwater? 

Thanks!

Would you not need to use a tripod? I use the technique with a Nikon Z6 topside and you can get amazing results. But stability seemed to be the key otherwise alignment is going to be a mess.

The OM-1 is capable of focus stacking handheld as it has a very fast frame rate, probably is limited by the need to limit shutter speed to 1/100 which is the sync speed for flash with electronic shutter UW.  I shoot the OM-1 on land and the stacking feature that is built in is quite amazing really.  I would guesstimate that in a low surge environment with 1/100 SS and a fairly sedentary subject  a 3 or 4  frame stack at f5.6 might be feasible handheld based on outdoor stacks I have done in light breeze waiting for movement to stop.  

I would like to try it out one day, but expect I'd have to wait till I upgrade my housing. The EM-1 MkII which I have  a housing for has the focus stacking feature but the frame rate is slower and flash sync speed at only 1/50 is an issue and I expect would struggle.  I'm not sure I want to spend $3500 for a new housing to find out if the process is feasible.  

So the considerations are electronic shutter sync speed and how many frames you can take in a burst and have your flash keep up.  I would guess ofr many subjects 3-4 frames might be yor limit.  

Think it would only work with a video light. 

I think a motionless subject and very stable camera position would be required, even if shooting at 10 frames per second.  I imagine it would only take a tiny bit of motion to completely lose any advantages gained by stacking.

A camera that has built-in focus bracketing (or focus stacking of course) is probably required.  Rocking back and forth will change your point of view, and manually adjusting focus would be too slow.

And I agree maybe turning your camera to max frame rate and shooting with constant lighting is the only way.  But then, if you are opening your aperture, you losing DOF.

I have tried this with some interesting results using my EM1 mkII. The strobe issues were eliminated because in any case I wanted to use a constant (ring) light source. The EM1 is forgiving in allowing a slight amount of movement. Two issues do emerge though, at least for my set-up. Firstly, the end stacked result is a jpg. Secondly, all that extra detail that comes into focus includes background and backscatter!

However, the camera delivers the raw source files that go into the stacking process, so you can choose one that has pin-point focus where you want it. But isn't that the same as just bracketing? Not on the EM1 mkII. For bracketing on its own, the focus alteration works from existing point to infinity, whereas in stacking mode it moves either side. Which to my mind is a bit more flexible. If the subject moves too much and causes the stacking process to fail, then you have the raw source images preserved regardless.

I will do some more experimentation, probably with bracketing on its own, and maybe with strobe. You can see a side-by-side comparison of results I have of a) stacked image, and b) selected bracketed image. Bear in mind (a) is post-processed from jpg, and (b) from raw.