There are two tiers within the HDgc family - one, that encompasses all of the established operational innovations (enhanced digital drive unit for zoom, focus, iris, and a 2x range extender), and a second that facilitates an even lower overall lens cost by excluding the extender system and replacing the e-Drive system with Canon’s more cost-effective new ergonomic Shuttle Shot drive unit. This KT20x5 KRS lens is in the latter tier.
The lower cost HDgc tier offers the KT20x5B KRS, a portable HDTV production lens with a 1/3-inch image format. This particular lens is intended for all whose foremost priority is to have a very cost-effective and lightweight HD acquisition system with the ability to shoot over long distances as well as to capture reasonable wide angles. It was specifically designed for the JVC HDV camcorders, which utilize three 1/3-inch CCD imagers.
About This Lens
Canon used breakthrough technologies and powerful computer-aided design techniques to produce the KT20x5B KRS, a multipurpose HD lens offering focal lengths of up to 100mm while maintaining a horizontal wide angle of 52 degrees. In addition, it is combined with an exceptionally high sensitivity (F1.4 maximum aperture), this is a lens that can be utilized in an unusually broad range of shooting situations at an attractive price point. It is a design directly responding to the expressed creative desires of broadcasters and HD producers for low-cost HD POV and special-application acquisition systems, while also facilitating the corporate, business and industrial sectors to painlessly transition from SD to HD.
The KT20x5B KRS represents a fine compromise between the demands for mobility in a handheld HDTV camera system and the high imaging performance requirements for HDTV production. The requisite optimization strategies to achieve this balance sought a high MTF over the entire image plane, minimization of chromatic aberrations, and maximization of image contrast. Relative light distribution was optimized for the more open aperture settings and this uniformity of brightness across the image plane combined with the high contrast and excellent picture sharpness to produces vividly clear HD pictures. Contrast was extended by careful control of black reproduction - with optical and mechanical design innovations that substantially reduced flare, veiling glare, and any internal reflections. Tight control of the geometric distortion at wide-angle settings cons
- Optical Technologies - Newly developed optical materials combined with the very latest lens element design innovations and multilayer coatings
- That produce an unsurpassed pristine imaging system for the most discerning production team
- Internal Focus - a Canon design innovation that uses a floating optical system to better control chromatic aberrations
- Control Technologies - Enhanced servo system called Shuttle Shot that adds value-added creativity to handheld acquisition systems
- Advanced Drive technology - encompasses servo control that allows the operator to precisely zoom between tow pre-programmed zoom positions
- Maximum Zoom speed is 1.2 seconds over entire range
- Mechanical Technologies - ergonomic mechanical design that produced this HD lens having the same size and weight as its SDTV predecessor
- Compact drive unit is mounted to the lens at a 12.5 degree angle for comfort and balance
- Aluminum alloy body for light weight and exceptional durability
- Ecological Design - 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 such as cadmium, mercury, PBBS etc from all components comprising the composite lens system