Canon’s breakthrough technologies and powerful computer-aided design techniques produced the KJ10ex4.5B IRSE, a standard HDTV lens with an excellent performance-cost optimization. In addition, it offers focal lengths of up to 45mm (or 90mm with extender) and a wide field of view of 93.7 degrees. It is a design that directly responds to the expressed creative desires of broadcasters and HD producers for low-cost HD acquisition system.
The KJ10ex4.5B IRSE represents a fine compromise between the demands for mobility in a handheld HDTV camera system and the high imaging performance requirements for HDTV production. The requisite optimization strategies to achieve this balance sought a high MTF over the entire image plane, minimization of chromatic aberrations, and maximization of image contrast. Preservation of a high MTF at the wider-angle focal lengths (where scene detail can be particularly high) was a special priority.
Relative light distribution was optimized for the more open aperture settings, and this uniformity of brightness across the image plane combined with the high contrast and excellent picture sharpness produces vividly clear HD pictures. Contrast was extended by careful control of black reproduction – with optical and mechanical design innovations that substantially reduced flare, veiling glare, and any internal reflections. Tight control of the 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.
SPECIFICATIONS
Zoom Ratio: 10x
Image Size: 2/3"
Built-in Extender: 2.0x
Range of Focal Length (with Extender):
4.5~45mm
9~90mm (2.0x)
Maximum Relative Aperture (with Extender):
1:1.8 at 4.5~34.5mm
1:2.35 at 45mm
1:3.6 at 9~68.9mm (2.0x)
1:4.7 at 90mm (2.0x)
Angular Field of View (with Extender) in 4:3 Aspect Ratio (8.8 x 6.6mm):
88.7°x72.5° at 4.5mm
11.2°x8.4° at 45mm
52.1°x40.3° at 9mm (2.0x)
5.6°x4.2° at 90mm (2.0x)
Angular Field of View (with Extender) in 16:9 Aspect Ratio (9.6 x 5.4mm):
93.7°x61.9° at 4.5mm
12.2°x6.9° at 45mm
56.1°x33.4° at 9mm (2.0x)
6.1°x3.4° at 90mm (2.0x)
M.O.D. from Lens Front: 0.3m (10mm with Macro)
Object Dimensions at M.O.D. (with Extender) in 4:3 Aspect Ratio (8.8 x 6.6mm):
67.9x50.9cm at 4.5mm
5.9x4.4cm at 45mm
34.0x25.5cm at 9mm (2.0x)
3.0x2.2cm at 90mm (2.0x)
Object Dimensions at M.O.D. (with Extender) in 16:9 Aspect Ratio (9.6 x 5.4mm):
74.1x41.7cm at 4.5mm
6.4x3.6cm at 45mm
37.0x20.8cm at 9mm (2.0x)
3.2x1.8cm at 90mm (2.0x)
Approx. Size (WxHxL): 168.2x110.6x237.7mm
Approx. Mass 4.04lbs (1.83kg)
Thank you for your interest in the Canon KJ10ex4.5B IRSE HDgc Series HDTV Lens.
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