Canon BU-51H Manuale tascabile - Pagina 6

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HJ14EX4.3B IRSE/IASE

Wide Angle HD Lens

After nearly a decade of advances in its world-renowned

optical R&D - and ongoing dialogue with hands-on users

worldwide - Canon has introduced the evolutionary next-step in high

definition imaging: the HJ14ex4.3B IRSE/IASE wide-angle portable

HDTV lens. Totally new and unique in its design, the HJ14 is the

product of Canon's very latest optical design tools, newly developed

glass elements, and highly advanced optical coatings. In addition,

the HJ14's newly developed Digital Drive unit provides improved

operability and ergonomic advances for user comfort and convenient

control of lens functions.

Wide, Advanced Optical Performance

Canon's HJ14 wide-angle portable HDTV lens features a minimum

focal length of 4.3mm and an angular field of view of 96.3° at the

wide end of the 16:9 HDTV aspect ratio. This optical performance is

combined with a 14x zoom range reaching to 60mm (120mm with

extender), which greatly expands creative options for the

acquisition of crystal-clear, and virtually distortion-free HDTV

video images.

Improved Operability, Digital Drive, and Lighter Weight

Employing free-form curves based on the shape of human hands,

Canon mechanically redesigned its new Digital Drive unit to be

more ergonomically friendly, making it narrower and shorter, and

opening more space for manual focusing. It also features newly

developed coatings and a new rubber grip support for a better

tactile interface. The overall result is the enhancement of user

interface and the reduction of stress and fatigue, especially

during prolonged shooting. The HJ14ex4.3B also employs a

smaller hood, which helps the camera operator view more of the

actual scene.

HJ15EX8.5B KRSE-V

Image Stabilized EFP HDTV Lens

Canon's HJ15ex8.5B

is the world's first

HDTV portable 2/3-

inch zoom lens with

a built-in Optical

Image Stabilizer.

Designed to maintain

stable images even when

the lens-camera is subject to jolts

and vibrations, the HJ15ex8.5B KRSE-V uses Canon's patented

Vari-Angle Prism image-stabilizer (VAP-IS) technology. Its high degree

of compensation is sustained all the way from telephoto to wide-angle

settings. This is of particular importance considering the extreme

image detail associated with HD acquisition. This unique technology

greatly extends flexibilities in EFP shooting on location - all within a

compact high-performance lens to weigh in at only 4.4 lbs.

Canon's Vari-Angle Prism technology entails a novel optical group

made up of two flat glass elements and a sealed bellows containing

a high refractive index liquid, selectively placed within the lens overall

optical system. Physical perturbations to the lens, in the form of jolts

or vibrations, flex the bellows proportional to the amplitude of these

disturbances. The associated distortion of the liquid instantaneously

alters the direction of the transmitted light rays in a manner designed

to counter the incoming light ray displacements created by these

disturbances. The system has been optimized to introduce a high-

degree of real-time compensation for image instabilities arising from

all forms of lens-camera operational unsteadiness.

The HJ15ex8.5 B KRSE-V is ideally suited for diverse challenging

outdoor shooting situations because it can stabilize a broad range

of vibration frequencies. Examples range from the low-frequency

vibrations encountered on a camera operator's shoulder in a crowd

situation, to tripod-mounted operation on shaky platforms, to the

higher-frequency vibration that cameras are subject to when

operated on vehicles, motorbikes, boats, or helicopters. Four

selectable stabilization modes are available to facilitate optimization

of the degree of correction under diverse, and sometimes unique,

shooting conditions.

The effectiveness of the image stabilization system was highlighted

in the coverage by a major European production company of the

Tour de France, whose camera operator was shooting hand-held from

a motorbike pillion, and consistently delivered rock-steady close-ups

of the cyclists even on very uneven roads.