before you shell out on a CALF-2  or the original for that matter.  consider what the files look like.and while I was running around grabbing some comparison shots with the Calf and the Canon and for kicks a GoPro - I realized when stacking them side by side at 200% clips.. the goPro actually render as nicely as the canon.. which makes no sense..  but then you realize the GoPro image sphere is 4900px. the calf is 3800px and thats pretty much all you need to know about why the new $700 calf - dont look THAT great compared to a couple last year GoPros with LensMod2.0

there are a lot of issues shooting GoPro 180vr, like sync, matching the files.. etc.. the calf spits out a ready to upload bit of 180vr..  but if you are "just" playing with it, maybe consider a GoPro rig.