This is an old shot - from 2020, but I thought
@RedRobin might be interested having seen a similar post on here. I didn't want to detract from that thread.
Its great fun to try longer exposures of surfers and kite/windsurfers. Sometimes I've used a 3 stop filter on bright days. The Olympus system with its IS is great for this.
This was taken at 1/80s on the EM1ii . I've used Topaz and I can see artefacts - plus the forum seems to have made it look more soft. It is extremely difficult to get it sharp if they're carving as opposed to speeding along parallel to the waves. I had a windsurfer shot that was much better and I think went into a magazine, but that was years ago and I'm struggling to find it.
Sometimes I've gone down to 1/40s, but haven't managed the 1/20s in the other thread, but then it's usually good waves and very windy which toughens the challenge.
View attachment 385907
I took some more last week, but they were using my Canon, so I'll just post a link. This time I closed the aperture to a ridiculous f/20 (no filters with me) and managed 1/100s. They're here
https://wightshots.pixieset.com/kitesurfing25-03-2023/
They were processed in CaptureOne and are a little over sharpened for my tastes.
I'm now going to go doolally looking for the windsurfer image that I really liked.