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CANON KJ20x8.2B HDTV Portable Lens (ENG / EFP)
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KJ20x8.2B IRSD (HDgc Series) For 2/3 inch Image Size Cameras
Addressing a wide range of users, from HD broadcasters to professional operators, the HDgc series represents a more cost-effective approach to advanced video production.
Previously, only relatively high-end HDTV lenses featured built-in extender. However, the recent arrival of many new lower-cost HD camcorders has created a strong market demand for more affordable
HD lenses with built-in extender. This is especially important for journalism and production applications seeking cost-effective HD acquisition systems within limited budgets.
In response, Canon proudly launches the KJ20x8.2B IRSD — a very affordable extender-equipped HDTV lens — that offers newsgathering and production organizations far greater image
framing flexibility. The KJ20x8.2B IRSD is Canon's widest (8.2 mm) lens in the affordable 20x class and it's generous range of focal lengths is now augmented with the 2x built-in extender.
Because of its affordability, superior flexibility, and remarkable operational features (detailed below), the KJ20x8.2B IRSD is set to
become the next generation's standard HDTV lens.
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Product Code: KJ20x8.2B IRSD
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| Main Features |
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Outstanding Optical Performance
New design tools, encompassing cutting-edge optical simulation and powerful 3D design technologies, combined with new optical glass
materials and new optical coatings produced a novel optimization of the cost-performance ratio of this new lens. The KJ20x8.2B IRSD exhibits a high MTF at picture center that is also well-controlled
out to picture extremities. The design optimization maintains that high MTF with operational adjustments of focal length and object distance. Longitudinal and lateral chromatic aberrations have been
minimized as well as monochromatic aberrations like coma and astigmatism. Geometric distortion at wide angle settings is imperceptible.
The new optical materials and multilayer optical coatings have effectively attenuated optical artifacts such as ghosting, flare, and veiling glare, that might be stimulated by strong light sources
in the scene (for example, sun in daytime and car headlight at nighttime).
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Newly Developed Advanced Drive Unit
Various companies have rolled out cameras with lens aberration correction functions in recent years. For this reason, the
KJ20x8.2B IRSD is fitted with a camera-communication interface to support these separate aberration correction functions.*1
The KJ20x8.2B IRSD's zoom can travel end to end in 1.0 seconds. The servomotor has a noise-suppressing construction to ensure there is no corresponding increase in noise. The drive unit features the
same ergonomically designed shape of the KJ20x8.5B KRS and others in the family that users have loved for its handling and grip.
On the newly developed advanced drive unit, the Memo switch, which sets specific zoom positions for the Shuttle Shot function (see right page), has been changed to a push switch. On previous drive
units, to memorize the zoom position, the operator had to adjust its position by a volume switch. The memo switch enables more reliable Shuttle Shot setup in the field where more consistent
functioning of the controls is required.
*1. Check with the camera manufacturer to see whether the KJ20x8.2B IRSD is compatible with the camera's aberration correction functions.
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General Specifications
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| Lens Model Number |
KJ20x8.2B IRSD |
| Zoom Ratio |
20x |
| Built-in Extender |
1.0x |
| Range of Focal Length |
8.2-164mm |
16.4-328mm |
| Maximum Relative Aperture |
1:1.9 at 8.2-115.4mm
1:2.7 at 164mm |
1:3.8 at 16.4-230.8mm
1:5.4 at 328mm |
| Angular field of view |
60.7°x 36.5° at 8.2mm
3.4°x 1.9° at 164mm |
32.6°x 18.7° at 16.4mm
1.7°x 0.9° at 328mm |
| Minimum Object Distance (M.O.D.) |
0.9m (10mm with Macro) |
| Object Dimensions at M.O.D. |
98.2x55.2cm at 8.2mm
5.0x2.8cm at 164mm |
49.1x27.6cm at 16.4mm
2.5x1.4cm at 328mm |
| Approx.Size (W x H x L) |
163.3 x 103.0 x 208.0 mm |
| Approx.Mass |
1.42kg (3.13lbs) |
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