KJ22ex7.6B II

Name: KJ22ex7.6B IASE II S
Brand: Canon
SKU: 3914B001

SKU

KJ22X7.6IRSE

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Optical Technologies
Digital Technologies
Optomechanical Technologies
Ecological Design

Terms
The following are the terms and conditions ("Terms") for the Canon U.S.A., Inc. Auto Replenishment System (the "Service"). These Terms are between you and Canon U.S.A., Inc. ("Canon USA," "we" or "us") and govern your and our respective rights and obligations relating to the Service. Please note that your use of the Service is also governed by Canon Direct’s Terms of Use and our Privacy Statement, each of which (as changed over time) are incorporated into these Terms, and all of which govern our respective rights and obligations concerning the Service. By placing an order through, or otherwise using, the Service, you accept, and agree to be bound by, these terms, conditions, limitations and requirements. Please read these Terms carefully.

Service
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Return Policy

Features Overview Specs Specifications Compatibility Reviews Resources Support Software

Overview

The KJ22ex7.6B is a second generation 2/3-inch HDgc portable HD lens. The design reflects design refinements to the first generation line of HDgc lenses originally introduced in 2006.

The HDgc line of lenses had been specifically developed to achieve a price performance ratio that was commensurate with cost-effective HD camcorders being introduced by all major camera manufacturers HDTV newsgathering, HD reality shows, and other lower-budget HD productions.

The KJ22ex7.6B IRSE is a portable HDTV production lens within the 2/3-inch image format sector of the HDgc family. This particular lens is intended for users whose foremost priority is an affordable HD lens that delivers a generous range of focal lengths combined with a wide field of view in a lightweight mobile package.

The imaging performance of KJ22ex7.6B has been significantly advanced by mobilizing the most contemporary of optical glasses, optical coating materials and processes, and powerful optical design tools. Customer feedback also spurred a total redesign of the digital drive unit that further optimized both the ergonomic aspects and the performance of the digital electronic control of zoom, iris, and focus.

The wide 7.6 mm focal length translates to a 64.6 degree horizontal angle of view for the 16:9 HD image format. Combined with a focal range that has been extended to now cover a range from 7.6mm to 168mm (and 336mm with extender) this lens offers unsurpassed operational capabilities in a compact package. Focus breathing has also been significantly reduced over the predecessor lens.

ABOUT THIS LENS

The KJ22ex7.6B is a telephoto lens covering a generous range of focal lengths while also providing a modest wide-angle of almost 65 degrees in the 16:9 HD image format. This provides a very flexible image framing range especially for outdoor applications. The central design criteria for this lens sought an excellent balance between size, weight, and HD optical performance intended for HD News and many HD production applications. Customer recommendations based upon experiences with our first generation HDgc telephoto lens combined with the harnessing of optical design strategies and advanced optical materials to produce an excellent overall price performance ratio for the KJ22ex7.6B.

The optical performance of the KJ22ex7.6B has been improved on a number of fronts compared to its predecessor KJ21ex7.6B. The lens deploys Large Diameter Aspherical lens elements that contribute to a better control of comatic aberration, geometric distortion, and corner resolution. Curvature of field and chromatic aberrations have been reduced by use of special optical materials that include Fluorite and Hi-UD glasses. Computer optimization of both the optical and optomechanical designs contributed to achieving a high-performing telephoto lens within a compact and lightweight body.

Features

Optical Technologies

The optical glass material used in this lens with unique dispersion characteristics, allow improvement in chromatic and geometric distortion. Lens element surface accuracy has been improved two-fold over those in the earlier HDgc lenses contributing to the improved MTF performance
Multilayer Optical Coatings combined with deposition processes produce an improved optical contrast ratio
Three-part Internal Focus is a Canon design innovation that reduces changes in aberrations when focusing to different object distances while also exercising improved control over any tendency for focus breathing
Powerful computer design tools facilitated a greater degree of optimization of multiple optical variables in the lens design

Digital Technologies

Fourth-generation digital servo systems further empowers the camera operator in terms of operational creativity:

Enhanced Digital Drive technology based upon a software platform provides precision microcomputer control of the three servo systems for zoom, iris and focus while also facilitating developments in lens-camera correction of lateral chromatic aberration
Unique Information Display and extended memory within the digital drive unit extends user-defined digital functionality
Canon's patented Micro Roof mirror Array (MRA) technology underlies the unique miniature 16-bit rotary encoders that are used for each of the zoom, iris, and focus position detection (each with a positional accuracy of 0.1 micrometer)
Dynamic Zoom Speed Range can be adjusted from 0.5 seconds to 5 minutes (from wide to telephoto extremes)

Optomechanical Technologies
Extensive use of 3D CAD-CAM design facilitated a design that paid high attention to operator comfort and attendant lowering of fatigue during protracted shooting:

Digital Drive Unit was designed to take into account the curved human hand that encompasses the unit with a view of shaping the unit for greater comfort and to better facilitate the actuation of lens controls. The unit shape also provides a wider separation that allows the other hand to more easily adjust the focus control. Finally, the drive unit was narrowed and its mounting angle on the lens set to allow the operator's elbow to settle close to the body thus providing an important reduction in fatigue when operating a shoulder mounted lens-camera system
Special Magnesium alloy body for light weight and exceptional durability
Computer simulation of the optomechanical design allowed examination of optimized anti-reflection internal barrel coatings, and structural techniques (light blocking grooves and knife edges) that produced greater control over harmful light reflections within the lens barrel that can be stimulated by strong light sources

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 from all components comprising the composite lens system.