VONOTO 2PCS Camera Flashlight Hot Shoe hotshoe cover with bubble Spirit Level for Canon Nikon Panasonic Fujifilm Olympus Pentax Sigma DSLR/SLR/EVIL Camera Slides into your hot shoe, remains unobtrusive Innovative circular design takes up less space than blocky 2- or 3-axis levels Rubberized surface for better handling Easier to read than see-through levels Slender design takes up very little space-- highly portable and efficient