The KJ20x8.5B KRSD zoom is a member of Canon's HDgc series of lenses, created specifically for portability and affordability, while providing long focal lengths up to 170mm combined with a reasonably wide angle of almost 55 degrees horizontal. Shuttle Shot, an enhanced servo system, lets the operator zoom back and forth between two positions for either checking focus or precise zooming, while the design incorporates a dual lens approach to broaden the shooting options, achievement of an adequate sensitivity, maximization of image contrast, and preservation of the highest MTF over the long focal ranges. The HDgc series lenses also incorporate special elements, including an artificially re-crystalized element, to minimize chromatic aberration.
SPECIFICATIONS
Zoom Ratio: 20x
Image Size: 2/3"
Range of Focal Length: 8.5~170mm
Maximum Relative Aperture:
1:1.8 at 8.5~113.3mm
1:2.7 at 170mm
Angular Field of View in 4:3 Aspect Ratio:
54.7°x42.4° at 8.5mm
3.0°x2.2° at 170mm
Angular Field of View in 16:9 Aspect Ratio:
58.9°x35.2° at 8.5mm
3.2°x1.8° at 170mm
M.O.D from Lens Front: 0.9m (10mm with Macro)
Object Dimensions at M.O.D in 4:3 Aspect Ratio:
85.2x63.9cm at 8.5mm
4.4x3.3cm at 170mm
Object Dimensions at M.O.D in 16:9 Aspect Ratio:
92.5x52.0cm at 8.5mm
4.8x2.7cm at 170mm
