Opteka Professional 1X-2.5X Right Angle Viewfinder for Canon EOS, Nikon, Olympus, Sony, Pentax Digital SLR Cameras Includes 5 eyepiece adapters for Canon EOS, Nikon, Minolta, Sony Alpha, Leica, Pentax, Olympus and Fuji SLR cameras Keeps correct subject position even with 360 degrees rotation Diopter adjustment to accommodate for individual eyesight. Rubber eyecup for comfortable viewing 9 elements in 5 groups with Opteka High Definition Multi-Coated Optics. Adjustable 1X - 2.5X Magnification. Eyepiece turns to focus.