The HJ17ex7.6B is a cost-effective new 2/3-inch portable HD lens specifically intended to support the emerging industry interest in high definition electronic newsgathering.

It is a key new member of a family of HD portable lenses intended to support the broadening of HDTV production. This particular lens is intended for producers and broadcasters having as their foremost priority an affordable lens-camera system that offers performance tailored for HDTV newsgathering.

The HJ17ex7.6B utilized breakthrough technologies and powerful computer-aided design techniques to produce an HDTV lens with a generous wide-angle field of view in a modest 3.6 lb package. The optional flexibility of Canon's Crossover aspect ratio switching system makes it a superb performer for both 16:9 widescreen and standard 4:3 image formats.

ABOUT THIS LENS
The HJ17ex7.6B represents an innovative solution to the pressing demands of broadcast newsgathering for low-weight and high-mobility and the exacting performance requirements for HDTV acquisition. The magnesium alloy body produced the desired low weight attendant with high durability. Superb optimization strategies helped achieve the sought-for performance - having a high sensitivity, an excellent MTF profile over the entire image plane, minimization of chromatic aberrations, and maximization of image contrast. The maximum aperture of f 1.8 makes this lens eminently suited to low-light newsgathering acquisition.

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.

Tight control of the critically important geometric distortion at wide-angle settings constituted another central design imperative. The lens spectral transmittance characteristic was closely coordinated with that of all of the major portable cameras to ensure adherence to the HDTV colorimetric standards and to additionally support flexible creative control of color reproduction.

• Four significant technologies converge to produce the HJ17ex7.6B portable HD ENG lens system that has been tailored to partner with today's highest performing HDTV portable cameras and camcorders:
  
• 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. The e-HDxs logo identifies the deployment of these technologies in the lens.

  • Power Optics - speaks to the combination of specialized materials, contemporary optical design, and multilayer coatings that produce the superb imagery
  • Internal Focus - a Canon design innovation that uses a floating optical system to better control chromatic aberrations
  • Crossover Technology Option - switchable operation between 16:9 and 4:3 aspect ratio imagery
• Digital Technologies
  

  New third-generation enhanced digital servo systems using Canon-developed 16-bit optical rotary encoder devices introduce entirely new value-added creativity to handheld acquisition systems

  • Enhanced Digital Drive technology - encompasses a microcomputer driven servo control that embodies position memory and user-defined digital functionality to significantly empower the camera operator charged with creative shaping of the image presented to the camera sensors
  • 16-bit rotary encoder for aperture control reports to the associated camera Iris control system (10-bit compatibility)
  • Maximum Zoom speed is 0.5 seconds and Focus is 1.5 seconds
• Mechanical Technologies
  

  Ergonomic mechanical design that produced this HD lens having the same size and weight as its SDTV predecessor

  • Compact digital servo drive unit is mounted to the lens at a 12.5 degree angle for comfort and balance
  • Magnesium 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 from all components comprising the composite lens system.