This Olympus VF-1 Viewfinder is designed for the 17mm Micro Four Thirds pancake lens, so it covers the 35mm field-of-view. This bright-line optical viewfinder mounts on the hotshoe. It features multi-coated glass lens element construction. The image quality is equal to the best German viewfinders, which cost 6x as much. Brand new, without the box, as I bought it in a camera kit. $75 + $5 shipping.