Canon proudly offers our HD portable lens series; the HJ40x10B IASD-V & HJ40x14B IASD-V.
The compact HJ40x11B/HJ40x14B achieves superior optical performance and high specifications at the same time, featuring a superior built-in Image Stabilizer which adds a perfect stability to your video production.
The HJ40x10B/14B series is designed to meet the high demands of all field production applications. The lens will surely lead you to a higher standard of production.
Canon’s Technology
Optical Shift Image Stabilizer (Shift-IS)
When the lens moves, the light rays from the subject are bent relative to the optical axis, resulting in an unsteady image because the light rays are deflected. By shifting the IS
lens group on a plane perpendicular to the optical axis to counter the degree of image shake, the light rays reaching the image plane can be steadied. Since image shake occurs in both horizontal and vertical directions, two shake detecting sensors for yaw and pitch, detect the angle and speed of movement and send this information to a high-speed 32-bit microcomputer, which converts the information into drive signals for the IS lens group. Then the actuator moves the IS lens group horizontally and vertically thus counteracting the image shake and maintaining the stable picture. The Shift-IS component is located within the lens group and is most effective for lower frequency movements caused by platform vibration or wind effect without increasing the overall size and weight of the master lens.
1.Lens when still.
Image plane
To Subject
2.Lens when jerked downward.
Camera shake
3.Counteraction by IS lens group.
Corrected light rays
Position of IS lens group after shifting
Enhanced Optical Technology
Special Optical Elements
Canon has always made an effort to research special optical elements since our beginnings in this industry with the goal of minimizing chromatic aberration. These efforts have included an artificial element, "Fluorite", with extraordinary dispersion characteristics and the newly developed "Hi-UD" (high index ultra low dispersion) glass. Canon has succeeded in the practical use of special elements along with advanced design techniques like "separate achromatism". Canon TV zoom lenses carry a "Green Ring" on the focus barrel, a symbol of our high quality. Canon has developed a break through in optical design technology known as the "Power Optical System" whose heart is the "X-Element". By using the "X-Element" to its maximum power in the specially designed optical layout, higher specifications and quality can be achieved in smaller and lighter lenses. The lenses designed using the "Power Optical System" are known as the "XS-series".
Digital Drive Unit
Aberration Correction for HDTV Lenses
The pixel size is about half in the HDTV system, and therefore the spread of a point image caused by a spherical aberration, coma, etc. should be diminished to about half. Even if the image is slightly out of focus, MTF is greatly influenced. The graph 1 shows how MTF varies when the focus changes. Canon HDxs series lenses employ the HD version of the Power Optical System, which incorporates the X-Element. HDxs greatly contributes to correcting and minimizing these aberrations at the same time, maintaining high MTF throughout the edge of the picture (graph 2).
100 |
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90 |
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80 |
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70 |
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60 |
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MTF(%) |
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50 |
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40 |
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NTSC 400TVL (30lp/mm) |
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30 |
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HDTV 600TVL (55lp/mm) F1.6 |
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20 |
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10 |
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0 |
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0.02 |
0.01 |
0 |
0.01 |
0.02 |
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Defocus(mm) |
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<Graph 1> |
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100% |
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HD |
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NTSC |
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MTF |
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0 |
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Center |
Middle |
Corner |
Edge |
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Image Hight
<Graph 2>
The HJ40x is equipped with a Digital Drive Unit which offers divers unique digital functions. The followings are the basic three preset functions that have become possible with the digital technology. The concept of the Digital Drive is based on "Ease of Operation" which enables you to use the diverse digital functions, precisely, easily and fully.
Main Features
Shuttle Shot
By memorizing any two focal lengths, the Digital Drive can automatically "shuttle" between the two points, moving in either direction.
Framing Preset
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's easy to repeat the same zoom as often as you like at the highest speed or in a preset zoom speed.
Speed Preset
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.
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