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Product Description
Specification
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Specifications:
- Frequency System: PAL/NTSC
- Validity Pixel: 280,000
- Camera Apparatus: 1/4inch Color CCD
- Horizontal Definition: 420line
- Minimum Illumination: 1LUX
- Lens: 16X Automatism Focusing
- Zoom Lens: 10X
- Exposal Mode: Auto
- Electronic Shutter: 1/50S 1/1000S (8 steps)
- Video Output: 1vP-P/75 Separated Y/C Output
- S/N Ratio: >=48dB
- Sync. System: Internal
- Power Supply: DC12V (+/-2V)
- Power Consumption: 4W
- Storage Temperature: -20℃ to 60℃
- Recommend to use a regulated DC 12V power supply unit with Camera for best picture and for safe operation of the unit
- Unregulated DC 12V power supply usually provides around 17-20V after loaded and can cause a damage on the camera
- Recommend to use the camera with the monitor which has the standard video input impedance level of 750ms
- If in any case your monitor is set to high impedance mode, please switch them on it or standard impedance position
- If the monitor do not have the impedance adjust switch, please ask us for a Camera suitable for your monitor
- Do not attempt to disassemble the Camera. There are no user serviceable parts inside .Refer servicing to qualified service personal
- Never face the Camera toward the sun. If may cause a smear on the picture when the Camera is directly faced to the sun or spot light or light reflecting objects
- Do not expose the Camera to rain or moisture, or do not try to operate the Camera in wet area .Moisture can damage the Camera and can create the danger of electric shock
Details:
- 1/4inch Color CCD 420TVL Security CCTV Wired 220X Zoom Camera
How Does a Zoom Lens Work?
Old Concept, New Technology:- Like all other electronics, camera lenses seem to get more and more complicated every year. Yet, aside from the flashy new settings and features, at the foundation of every lens is the same basic technology that has been there since the beginning
Background: How Does a Camera Work?
- Before getting into the technical functions of a lens, it should first be understood how a camera works
- The word "photography" is rooted in Greek and roughly translates to "painting with light." The original concept of a camera was literally a pin-sized hole in a wall that let light into a room. This is referred to as a "camera obscura," a Latin phrase that means "dark chamber."
- Cameras today, no matter how advanced, still use this same basic technology. Light is let in through the lens, which then reflects the light onto a sensor that rests inside of the camera
- The camera's lens merely helps to regulate how much light is let in and how the light is processed before reaching the sensor
Know Your Lens:
- The inner workings of a zoom lens, in a most basic form, consist of different small optical glass lenses that are placed at different lengths from each other
- With most zoom lenses, the zoom function is used by manually turning a ring located on the barrel of the lens. Inside of the camera, this will move a group of the glass pieces either closer to or further away from each other
Focal Length:
- It's not unusual to see some professional photographers lugging around two or three different lenses with them wherever they go. The reason they find it necessary to carry all the extra weight is because different lenses have different focal lengths
- Focal length refers to the distance from the camera's image sensor to the optical glass pieces inside of the lens. This distance is what determines how far a lens can zoom in and out and is placed into three basic categories: wide-angle, normal and telephoto
- A wide angle lens refers to a lens with a short focal length. Lenses of this sort, as the name would imply, have a very short, wide view, sometimes enabling photographers to take pictures of an entire room of people with one shot. Lenses in this category are what "fish-eye" photos are taken with
- Lenses that fall under the "normal" category see at focal ranges ranges similar to that of the human eye; 50mm and 35mm lenses would be considered normal focal length lenses
- Last but not least would be telephoto lenses. These lenses are normally the longest (and heaviest) of all categories. When looking through a telephoto lens, the subject often appears very close, yet the view of the subject will be very narrow
In Surveillance Cameras:
- Variable focus in a single lens came to security cameras in the 21st century, but is usually set manually: When you set up your surveillance system, you can choose where in its field of view you want each camera to focus. The camera doesn't zoom in on suspicious activity, and you can't refocus recorded video to read a license plate
Package Included:
- 1 x Zoom Wired Camera
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