The LCDVF 3/2 Digital SLR ViewFinder from LCD Viewfinder is a loupe that mounts around the LCD display of your Canon EOS Rebel T2i (aka 550D or Kiss X4), allowing it to be used as an LCD viewfinder with 200% (2x) magnification. By using the LCDVF 3/2 while in the camera's video mode, you can achieve more accurate focus and increase stability of handheld shooting. The LCDVF 3/2 can also be used by still photographers who either want to block out light while shooting in Live View mode or to inspect pictures on the LCD display.
The viewfinder has a magnetic mounting interface which allows rapid mounting and demounting without any wear and tear. There are 4 small magnets embedded in the plastic skirt of the LCDVF 3/2 which will not damage your camera.