I came across this whilst looking at Z series accessories..... https://www.bhphotovideo.com/c/prod...r_nikon_z.html/DFF/d10-v21-t1-x1081374/SID/EZ and noted on the spec this.. Change vertical or horizontal orientation without losing the center of axis Arca-type compatible dovetail design Sensor centering lines on the rear of bracket Complete access to battery door and camera ports No interference to LCD screen movement Compatible with the FTZ adaptor Compatible with the industry standard QD (Quick Disconnect) System Machined from black anodized 6061-T6 aluminum I guess i've missed something, but I've never heard of the QD System, certainly not as an industry standard! I Googled it and 80% of the results relate to slings and swivels for firearms. Maybe that's why I've never come across it here in the gun-free UK! The manufacturer's site shows what it's about. Quick Disconnect System | Kirk Photo Anyone use it? Anything worth knowing about?