Canon EF 24-105mm F4L IS II USM lens review: Updating a classic

  Specifications and features Often bundled with Canon EOS 5D models as a kit, the original model was regarded as highly-versatile lens for stills, and particularly favored by video enthusiasts for its parfocal-like qualities. Promoted by Canon as a one-lens solution, the upgrade features a refreshed optical construction with a total of 17 elements arranged in 12 groups, and a minimum focus distance of 1.48’ (45cm). Although the new lens no longer features any UD glass, four of its elements are glass molded aspherical types. These help reduce chromatic and spherical aberrations, and lower distortion, while at the same time keeping the design smaller