This Linhof viewfinder is suitable for 4x5 and 5x7 cameras, with variable fields of view from 90mm (or 120mm, for 5x7) to 360mm (or 500mm). It's adjustable for portrait or landscape shooting, too, which is handy. These viewfinders are mostly useful as a  framing aid: you can use them mounted to the camera, or as a handheld "director's viewfinder. The view through the optics is satisfactory, though you'll need to refocus your eye to see the framelines in sharp detail: the viewfinder isn't defective, this is just how they made 'em. Note that this viewfinder mounts to Technika accessory mounts only, not the standard ISO hot shoe found on many other cameras. In good cosmetic condition, with light paint and finish wear; glass has minor dust.