I had been laying on my belly, and at no point did my lens touch the sand. When I’d get up, I’d carefully brush the sand off, and ensure nothing was on my hands before touching the camera again. At some point, I must have missed a little bit along my leg, and I let the camera hang down by the sling, brought it back up and saw some sand sticking to the ring and a little on the skin. Brushed it off, didn’t think anything of it until I went to adjust focus, and >
crackling grind <
Can’t recommend a lens cover enough if shooting anywhere near sand. This has been damn annoying.