Abstract: Tripods and other support componentry for cameras, lighting and other equipment including a convertible tripod selfie-stick with dog-legged tripod legs collapsible together to form a singular selfie-stick shaft, foldable couplers on the tripod legs for optional attachment of supplemental feet thereto, a yoke body with a threaded collar that both tightens a ball and socket joint of each tripod leg and anchors a secondary tethering of each leg, a string-of-pearls latching mechanism for providing such secondary tethering of other components, a magnetic basal of lobe-shaped footprint and composite construction, a squeeze lever lock for telescopic tubes of a tripod leg or the like, a slidable ring coupler displaceable along a tripod leg or other shaft and lockable thereto via a tightenable collet, a rock-and-dock accessory mount for a tripod leg or the like, and a smartphone/tablet holder and cooperating case with a ball and socket connection.