Canon kh21ex5.7irse, KH21ex5.7 IRSE HDgc 1/2 inch lens for Sony XDCAM HD camcorders
The KH21ex5.7 is a telephoto portable HDTV production lens within the 1/2-inch image format sector of the HDgc family. This particular lens is intended for producers and broadcast and cable news photographers having as their foremost priority the ability to shoot over long distances combined with reasonably wide angle capture in a lightweight (4.1 lbs) mobile production lens system having very good HDTV performance.
It was specifically designed for the new HD XDCAM camcorders from Sony, which utilise three 1/2-inch 1440-element CCD imagers.
Enhanced Digital Drive
The KH21ex5.7, KH16ex5.7 and the KH10ex3.6 carry Canon’s original Enhanced Digital Drive, a drive unit equipped with an information display and a digital function selector so that the user can customize the enhanced digital functions much more easily and precisely. The new design enables the user to fully bring out the digital functions.
By memorizing any two focal lengths, the digital drive can automatically “shuttle” between the two points, moving in either direction.
An angle of view can be preset in either of two memories and the lens will zoom to that position by pushing a simple button. During a performance, framing preset will reproduce the zoom position decided upon at the rehearsal. It is easy to repeat the same zoom as often as you like at the highest speed or in a preset zoom speed.
A specific zoom speed can be preset in memory and it is possible to repeat the zoom speed as often as you like by pushing a simple button.
Equipped with Canon's original Rotary Encoder Device
Canon is introducing a new series with a new enhanced digital drive unit which 16 bit resolution Rotary Encoder Devices has built in.
|Lens Model Number||KH21ex5.7B IRSE|
|Range of Focal Length
|Maximum Relative Aperture
|1:1.4 at 5.7~86mm
1:1.95 at 120mm
|1:2.8 at 11.4~172mm
1:3.9 at 240mm
(9.6 x 5.4mm)
|62.9° x 38.0°
3.3° x 1.9°
|31.5° x 19.0°
1.7° x 0.9°
|Minimum Object Distance (M.O.D.)||0.8m (10mm with Macro)|
|Object Dimensions at M.O.D.
(9.6 x 5.4mm)
|92.2 x 51.9cm at 5.7mm
4.3 x 2.4cm at 120mm
|46.1 x 26.0cm at 11.4mm
2.2 x 1.2cm at 240mm
|Approx.Size (W x H x L)||169.4 x 111.9 x 217.5mm|
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