Review: Sigma 500mm f/4 DG OS HSM Sport Lens
The-Digital-Picture has completed their review of the Sigma 500mm f/4 DG OS HSM Sports Lens. At $5999 the new Sigma seems like a good deal, until you consider that you can buy a Canon EF 500mm f/4L IS II refurbished from Canon for under $7000 on occasion. canonrumors.com »