The Canon KJ20x8.2B KRSD is a high-definition ENG (Electronic News Gathering) zoom lens designed for broadcast, corporate, education, and event videography, offering a 20x zoom ratio from a wide 8.2mm focal length to 164mm, with a fast f/1.9 maximum aperture. This lens is known for its sharp images with minimal distortion due to advanced optical coatings and dispersion glass, a fast and quiet servo drive for smooth zooming in as little as one second, and features like the "Shuttle Shot" function for instant recall of pre-stored zoom positions.