The ioptron skytracker dslr ball head offers smooth pan and tilt movements and can be independently adjusted for precise control the base is equipped with a 38 tripod socket and wide diameter of 2 inches for 360 degree precision panning which makes it the ideal firm base for astro photography with the ioptron skytracker the quick release plate system with thread is universal making it compatible with most major brands a plate lock and safety lock provides secure mounting of your camera