This thing rocks! All adjustments are tool-less and it mounts solidly and simply to the camera. It has a rugged clutch system that lets users tilt their viewfinder to any angle, can be configured into an almost unimaginable contortion of positions and telescopes out to allow comfortable EVF use for both right or left eye operators. Hands down this is the best EVF mounting system on the market, not to mention that it also looks really damn cool.