I've got one. It's cool. Pretty good. Pretttttttty, pretttttttttty, pretttttty good.
lemme just attach this to my new GoPro and... DANGit.
It's a shutter speed chart, not a proper exposure chart. An electronic shutter is upstream of the remaining two elements of the proper exposure triad. A slow shutter speed will result in blurry motion regardless of how properly exposed the image is.