This Linhof viewfinder is suitable for 4x5 cameras, with variable fields of view from 90mm to 360mm. 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 okay cosmetic condition, with notable paint and finish wear.