LCDVF Digital LCD Viewfinder for Digital SLR Cameras with 3'' Screens Suitable for most 3" screens ,Canon 1D mark iv,5D mark II,7D,S90,Nikon D90,D300s and others Spontaneously transform your video enabled DSLR into a discreet handheld video camera Stabilizes camera when shooting video handheld Aids on the fly focusing Allows the use of LCD in bright daylight outdoors