The studioking right angle finder craf25 should be mounted on the viewfinder of your camera. through this angle finder can look through the viewfinder of the camera at an angle of 90 degrees. this can be handy when shooting from high or low positions. the magnification (1.25x or 2.5x) can be determined by using the switch. in some cases, you must use a connection adapter. Suitable for: canon, nikon, pentax, minolta, fuiji, olympus and leica slr cameras. Canon: de 22mm en 18 mm Nikon: rectangular models d40/d50/d60/d70s/d80/d90/d200/d300 and  round models  df/d4/d3s/d3x/d2/d1/d800/d800e/d700/f6/f5/f4/f3/f3hp/f3t/f100/f90x/f90/f801s/fm3a    Fujifilem:  x-t1 x-t2 Olympus: om-d/e-m/ e-m10/om0 Pentax 1: pentax*istd/*istds pentax slr Pentax 2: k110d/k10d/k20d/k-5/k-r/k-x/k-7/k-m Leica: r4