SL-3 Hot shoe cover Fits NIKON, OLYMPUS, PENTAX, SAMSUNG,PANASONIC, etc. JJC SL series 2in1 Spirit Level Hot shoe Protector is mountable ... see whether the bubble is centered, and this level takes up much less space than a large acrylic block!· Slides into ... shoe, remains unobtrusive· Innovative circular design takes up less space than blocky 2- or 3-axis levels· Rubberized surface for better handling ...