The Canon KJ20EX4.5B IRSD PS12, 2/3" ENG/EFP Zoom Lens for Select Panasonic Cameras is a portable HDTV production lens within the 2/3" image format sector of the HDgc family. This particular lens delivers a generous range of focal lengths combined with an exceptional wide field of view in a lightweight mobile package. The KJ10EX4.5B offers focal lengths up to 90mm (with the built-in extender) and a wide-angle of almost 94 degrees horizontal.
The KJ10EX4.5B utilizes new technologies and computer-aided design techniques to produce a very wide-angle HDTV lens. It is a design directly responding to the expressed creative desires of broadcasters and HD producers for more versatility in an HD acquisition system. The KJ10EX4.5B represents a compromise between the demands for mobility in a handheld HDTV camera system and the high imaging performance requirements for HDTV production. The KJ10EX4.5B has a high MTF (Modulation Transfer Function) 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 combines with the high contrast and excellent picture sharpness to produce crisp and clear HD pictures. Image distortion caused by chromatic aberrations can be further reduced when this lens is used with a camera that is enabled with Panasonic's Chromatic Aberration Compensation (CAC) technology.
By memorizing any two focal lengths, the digital drive can automatically "shuttle" between the two points, moving in either direction.
An angle of view can be preset in either of two memories and the lens will zoom to that position by pushing a simple button. During a performance, framing preset will reproduce the zoom position decided upon at the rehearsal. It is easy to repeat the same zoom as often as you like at the highest speed or in a preset zoom speed.
A specific zoom speed can be preset in memory and it is possible to repeat the zoom speed as
often as you like by pushing a simple button.
The lens is compatible with Panasonic's Chromatic Aberration Compensation (CAC) technology. When used with a CAC-compatible camera the lens and camera communicate to compensate for chromatic aberration errors. This feature only works with cameras that are CAC enabled.