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Canon KJ20x8.5B KRSD A

Concept of HDgc Series
Corresponding to the digital High Definition broadcasting and diversity of HDTV equipment, Canon has added a new series to its HDTV lens line up, the HDsc series. The new HDgc series supports the emergence of an important new generation of cost-effective HD acquisition systems. Adopting the advantages created by Canon's unique technology, the new HDgc lenses exhibit high MTF, high resolution and high contrast from the center of the image to its extreme edges, meanwhile maintaining its compact size and weight.
Another important policy of Canon's is not to pollute the earth and the HDgc series succeeded in excluding harmful substances such as cadmium, PBBS, PBDPE or mercury from the mechanical parts, and at the same time incorporating lead free glass and reducing the amount of hazardous substances used in electrical parts.
See more imformation from our FAQ.

Shuttle Shot Function
Shuttle Shot is a Canon Exclusive Technology that enhances production capabilities. At the touch of a button, this feature allows the operator to zoom back and forth instantly between any two positions. It can be used to zoom to the telephoto position to check focus and then return instantly to the original position or you can “shuttle# between any two zoom positions at any time.

Compact Design
The KJ20x is smaller in size and lighter in weight compared to the traditional BCTV lenses, which allows ease of use when carried on a shoulder.

Newly Developed Advanced Drive Unit
Various companies have rolled out cameras with lens aberration correction functions in recent years. For this reason, the KJ20x8.5B KRSD A is fitted with a camera-communication interface to support these separate aberration correction functions.*1
The KJ20x8.5B KRSD A's zoom can travel end to end in 1.0 seconds. 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 fi eld where more consistent functioning of the controls is required.

*1. Check with the camera manufacturer to see whether the KJ20x8.5B KRSD A is compatible with the camera's aberration correction functions. 

Lens Model Number KJ20x8.5B KRSD A
Zoom Ratio 20x
Built-in Extender -
Range of Focal Length
(with Extender)
8.5~170mm
Maximum Relative Aperture
(with extender)
1:1.8 at 8.5~113.3mm
1:2.7 at 170mm
Angular field of view
(with Extender)
4:3 Aspect Ratio
(8.8 x 6.6mm)
54.7° x 42.4°
6.5° x 4.8°
16:9 Aspect Ratio
(9.6 x 5.4mm)
58.9° x 52.0°
4.8° x 2.7°
Minimum Object Distance (M.O.D.) 0.9m (10mm with Macro)
Object Dimensions at M.O.D. 4:3 Aspect Ratio
(8.8 x 6.6mm)
85.2 x 63.9cm at 8.5mm
4.4 x 3.3cm at 170mm
16:9 Aspect Ratio
(9.6 x 5.4mm)
92.5 x 52.0cm at 8.5mm
4.8 x 2.7cm at 170mm
Approx.Size (W x H x L) 163.3 x 103 x 170.4mm
Approx.Mass 1.27kg

Operational Accessories
Semi servo MS-21 / MS-22 / MS-15