The KH19x6.7 KTS is a cost-effective new long focal length portable 1/2-inch HDTV production lens offered by Canon.
This particular lens is intended for producers and broadcasters having as their foremost priority an HD acquisition system of modest cost – possibly to support high definition ENG or a diversity of professional, business and industrial production applications.
This lens is intended to work in conjunction with the new ½-inch image format HDTV cameras and camcorders that are emerging as low-cost HD acquisition systems for newsgathering, point of view, and other special applications.
The KH19x6.7 KTS has an excellent sensitivity of f 1.6 over an almost 15x zoom range (falling modestly to f 2.1 at full telephoto). It has a generous 55-degree horizontal field of view and weighs in a low 2.8 lbs. This lens is anticipated to be a superb workhorse that can address a wide range of field production projects.
The design optimization strategies sought a balanced MTF profile over the entire image plane at an F4.0 aperture setting. Relative light distribution was optimized for F2.8 and above and this uniformity of brightness across the image plane combines with the high contrast and excellent picture sharpness to produce vividly clear HD pictures. Contrast was extended by superb control of black reproduction – with optical and mechanical design innovations that substantially reduced flare, veiling glare, and any internal reflections. Similar attention to minimization of ghost images and other highlight-related chromatic distortions caused by strong light sources on-axis and off-axis further extend the operational contrast range of the lens.