The tokina at x 24 70mm f28 pro fx lens gives photographers with full frame canon camera bodies a 24mm wide angle to 70mm moderate telephoto lens with a fast f28 aperture at an affordable price this standard wide angle to portrait length zoom is ideal for travel event night shooting portraiture landscape and more its advanced optical design uses three precision moulded all glass aspherical lens elements to achieve excellent contrast sharpness and corrects for spherical aberrations