need a lcd screen protector for my Canon 5D but not sure which one to buy? I searched BH and the only one I found for the 5D is the Giottos which is a stick on protector seen here http://www.bhphotovideo.com/c/product/483866-REG/Giottos_SP8253_SP8253_AEGIS_Professional_Glass.html. Anyone know anything about it? Are there any others that I should look into? I have used them on my schools Nikon D200 which clipped right onto the back of the body. Doesn't look like my 5D has that option. Any help is greatly appreciated!