While I think the Ski Doc is a great product, there were two areas that I felt could be improved. First was the skier tracking, and I detailed a couple of minor things I did to improve that somewhat in my previous posts. The second was the difference in viewing angle of the skier from left to right because the camera’s lens axis does not look straight down the line. Rather, it is mounted 5” off to one side resulting in parallax. That makes it harder to accurately compare your onside and offside since the camera viewing angle is different for each.
So I made this simple bracket, and attaching it required almost no modifications of any consequence to the SkiDoc. I removed two of the screws from the underside holding the top and bottom plates together, the ones opposite each other at the sides, 90° from the rope guides. I then drilled those holes from the bottom completely through the top plate. I then used machine screws and nuts to attach the bracket securely. I then removed the original camera mount handle entirely, which only requires removing a single long Allen head machine screw. I offset the GoPro mount on the bracket 3/4” so that the lens is directly over the pylon, completely eliminating parallax. The whole project didn’t take a full hour.
So not only is parallax eliminated, the camera tracks slightly better as well, since the COM of the camera is now directly in the center of rotation of the SkiDoc. Eliminating the inertia of the mass of the camera and the camera handle mount from out on that 5” lever reduces the tracking lag a bit more as the Ski Doc responds more readily to the rope movement. The two photos show me at 28 off in both cases. In one, with the Ski Doc unmodified, I am nearly going out of the frame (1.4x zoom). The second shot using my bracket and the same zoom, I am higher the boat yet still well within the frame, possibly allowing the use of a higher zoom.
All it took was a piece of 1/8” x 1” aluminum bar, plus two machine screws and nuts and a 1/4/20 machine screw as a tripod screw, plus a vice to bend the aluminum.
I should add the Ski Doc can be restored to its original configuration and function in 5 minutes, with only the 2 machine screws and nuts being different than before, and they don’t affect a thing.
(For some reason the photos display in a different order than I posted, but you can still see the difference.)