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Canon KH20X6.4BKRS 1/2" HD Professional Lens |
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HD 6.4-128mm Professional Video Lens, servo zoom, manual focus, shuttle shot, macro.
In 2006 Canon is introducing a new family of portable HDTV lenses for EFP, ENG, and a range of corporate and business industrial applications. In so doing, an important hierarchy in HD optics is being created. It is important because of the highly innovative developments by the world’s major professional video manufacturers in their recent introduction of a diverse range of new low-cost tapeless HD camcorders and tape-based HDV professional camcorders. Various design strategies have been adopted by the manufacturers to decisively drive down the costs of these HD acquisition systems. They include different image format sizes, subsampled imagers, and contemporary digital recording techniques. In support of these products Canon is designing an entire new family of cost-effective HD lenses that seek to match both the performance and the costs of these diverse and still-emerging HD acquisition systems. To distinguish this level of lens within the overall Canon HD optical hierarchy they are being identified by the logo HDgc – to clearly differentiate them from the already established high performance HDxs line of 2/3-inch portable lenses.
These new acquisition systems have been developed in response to the broadcast industry’s rapidly growing interest in transitioning to HDTV Newsgathering, HD reality shows, and other lower-budget HD productions. They also directly address the increasing adoption of HD digital origination by the growing independent filmmaking market sector. In addition, they are anticipated to foster growing interest in HD within the broad B2B market sectors. To support this extensive flexibility in HD acquisition systems, the new HDgc family will include 2/3-inch, 1/2-inch, and 1/3-inch lenses.
There are two tiers within the HDgc family – one, that encompasses all of the established operational innovations (enhanced digital drive unit for zoom, focus, iris, and a 2x range extender), and a second that facilitates an even lower overall lens cost by excluding the extender system and replacing the e-Drive system with Canon’s more cost-effective new ergonomic Shuttle Shot drive unit. This KH20x6.4 KRS lens is in the latter tier.
The KH20x6.4 KRS is a portable HDTV production lens within the 1/2-inch image format sector of the HDgc family. This particular lens is intended for all who have as their foremost priority the use of a very cost-effective and lightweight (2.8lbs for this lens) HD acquisition system for shooting over long distances combined with reasonably wide angle capture. It was specifically designed for the new HD XDCAM camcorders of Sony, which utilize three 1/2-inch 1440-element CCD imagers. It is an important member of the emerging HDgc family in terms of facilitating HD imaging with equivalent operational capabilities as the established 2/3-inch SDTV systems. |
KH20X6.4BKRS
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Details
Specifications
| IMAGE COMPOSITION KH20x6.4 KRS |
| Object Image Format |
1/2 Inch 16:9 Aspect Ratio |
Object Image Size (Presented
to Camera Imagers) |
6.97 mm (H) x 3.92 mm (V) |
| Zoom Ratio |
20 X |
| Focal Length Range |
6.4------------128mm |
| Angular Field of View : |
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| At 6.4mm |
57.1° (H) x 34.1° (V) |
| At 128mm |
3.1° (H) x 1.8° (V) |
| OPTICAL BRIGHTNESS KH20x6.4 KRS |
| Maximum Relative Aperture |
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| (F-Number) |
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| At 6.4mm-------89.6mm |
1 : 1.4 |
| At 128mm (Ramping Characteristic) |
1 : 2.0 |
| SCENE COMPOSITION KH20x6.4 KRS |
Minimum Object Distance
(MOD) (From Front of Lens) |
0.9 Meter (10mm with Macro) |
| Scene Object Dimensions at MOD |
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| At 6.4mm |
89.8 cm x 50.5 cm |
| At 128mm |
4.6 cm x 2.6 cm |
| PHYSICAL ATTRIBUTES KH20x6.4 KRS |
| Size |
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| Width |
163.3mm |
6.4in |
| Height |
103.0mm |
4.1in |
| Length |
182.5mm |
7.2in |
| Weight |
2.8lbs 1.27kg |
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