Review on Sigma 50-500mm f/4.5-6.3 APO DG OS HSM SLD Lens for Canon DSLR Camera - Ultimate Ultra Telephoto Zoom Lens by Paul Sanchez

I've wanted this lens for several years but was afraid of spending so much and maybe wasn't happy with it. When I saw the price drop, I decided to buy. It has now become my favorite lens. The focus is very sharp, easy to use and so flexible from 50mm to 500mm that the only other lens I currently use is my wide angle lens for close-ups. The only problem is that I need a stronger tripod due to the weight of the lens.