Thanks for uploading that video, Frank. It's always interesting to see the differences in 3D cameras. I usually watch 3D first with the glasses on, and then re-watch it as I lift them up and down. It's fascinating to see the differences in the convergence and divergence of objects within the frame with different 3D rigs. I'm too new to 3D to understand exactly what's going on, but the manufacturers seem to take different approaches to it. Distant objects shot with the Sony camcorder almost always look fairly widely diverged, similar to the GoPro. Objects at similar distances with the JVC seem to converge much more. Also, the convergence/divergence with the JVC is different depending on how I initially frame. That is, if I start a shot with objects close up and then tilt up to objects further off in the background, there's greater divergence of those distant objects than if I frame on them at the start of the shot. This tells me that there are some moving elements in the optics and/or on the chips in the JVC that determine how the left/right images come together to create 3D. Obviously, that's not happening with the GoPro, with its fixed lenses. And unless I'm mistaken it's also not happening with your dual camera rig. You don't have variable convergence working on that rig yet, do you?
As I said, I'm too new to all this to draw much in the way of conclusions yet. What I do know is that, mostly, I prefer the sense of depth in the 3D video created by your dual Canon rig. The JVC doesn't provide as much. OTOH, I do like a lot of things about the JVC camcorder. If I frame carefully, the sense of depth is quite pleasing, though not as dramatic. The 3D is clean, and the depth of field is almost unbelievable. Objects from very near to very far are tack-sharp, with incredible detail. I also love the color and contrast of the JVC. I've been to Shaw's Garden a zillion times, and I'm continually impressed by how much the JVC's 3D makes me feel like I'm really there. No 2D camera has ever come close to doing that for me. So, I'm very satisfied with the JVC in those ways.
Here's what might settle some "debate" (if there is any
) about the differences in how your 3 systems perform, and specifically about the relative benefit of a wider IA distance. Put them on tripods and shoot things with settings as close as possible on all three. Set them up so that there are objects near, medium and far away. After that, throw in a shot with the Canons at their widest wide angle setting. I think I know the enhancement that's going to provide to the subject matter. I suspect it will increase the dramatic impact, just as wide angle shots have the capability of doing in 2D filmmaking. But I could be wrong. That's why I'm so keen on seeing such a comparison. If the variables are the same except for the interaxial distance, then we may be able to draw some more solid conclusions about its effect. The wide angle impact should make such a comparison even more revealing.
Almost forgot. It would be helpful to see the effect of telephoto, just like wide angle settings. That is, zoom in to the same telephoto framing with the JVC and the Canons, and we can look for differences in the sense of depth at the zoomed in range. Then, throw in a shot of the Canons at their max telephoto range.
See what I did there? I planned your weekend for you.