Canon Lens Production 3

Making of Canon L Series 500mm F4L IS USM. Part 3 of 3 in the production of expensive camera gear. L series is Canon s Premium lens line featuring fluorite lenses. IS refers to Image Stabilzation build into the lens, and USM refers to Ultrasonic Motor drive that makes focusing faster than older systems. Currently I m using a Rebel XT, although I m thinking of upgrading to an XTi or 5DMk2. This 500 with the New 5D would be a sweet combination.