interesting to see exactly how (im)precise the inner workings of a D3 and 50/1.4 really is.
I woudln't have expected as much mirror bounce as seen in the shutter view to begin with.. being a D3 I'd have expected it to be rock stable... but(without a reference point)maybe this is as stable as they get!!
50/1.4 looks a bit worrying tho... watch the aperture very carefully both when opening and closing/stopping down(the setting is at f/16 remember).
Watch specifically for the small delay as the aperture doesn't fully close, and then finally does, but the strange releasing of the aperture(back to wide open) looks very interesting.
On the openign stage there is a moment where the aperture stops opening and then starts again?
(sticking aperture blades?)