Minimization of monochromatic and chromatic aberrations and further maximization of image contrast combine with improved MTF. The relative light distribution over the mid-to-long focal lengths with better uniformity of brightness across the image plane also provides the higher contrast. These combinations ultimately produce vividly clear and superb sharp HD pictures.
Newly developed high index optical glass materials and the Aspheric Lens Elements allow improved control over chromatic aberrations and geometric distortion especially at the very wide angle settings. Canon’s three-part Internal Focus innovation reduces changes in aberrations when focusing to different object distances while also exercising tight control over any tendency for focus breathing.
New Enhanced Digital Drive technology provides precision microcomputer control of the three servo systems for zoom, iris and focus while also facilitating new developments in lens-camera correction of lateral chromatic aberration.Dynamic Zoom Speed Range can be adjusted from 0.5 seconds to 5 minutes (from wide to telephoto extremes).
Computer simulation of the optomechanical design allowed examination of optimized anti-reflection internal barrel coatings, and structural techniques (light blocking grooves and knife edges) that produced greater control over harmful light reflections within the lens barrel that can be stimulated by strong light sources
All contemporary Canon lenses avoid the use of materials and substances potentially harmful to the environment. Lead has been removed from all optics and other identified substances from all components comprising the composite lens system.