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- Image Device: 1/3inch Sony CCD
- TV System: PAL/NTSC
- Image Size: 3.6mm x 2.7mm
- Picture Elements: PAL: 500(H) x 582(V); NTSC: 510(H) x 492(V)
- Scanning Frequency (Horizontal): PAL: 15.625KHz; NTSC: 15.7343KHz
- Scanning Frequency (Vertical): PAL: 50Hz; NTSC: 60Hz
- Horizontal Resolution: 420 TV Lines
- Lens Mount: C/CS Mount (C Mount adaptor option)
- Auto Iris Lens: Video/DC
- Lens: 4-9mm
- Lamps: 36 pcs White Lamps
- Electronic Shutter Speed: 1/50 (1/60)-1/100,000(sec)
- S/N Ratio: More than 48db(AGC Off)
- Minimum Illumination: 0.5 Lux
- White Balance: Auto Tracking White Balance
- Black Light Compensation: ON/OFF Switchable
- Electronic Shutter Control: EE/AI Switchable
- Mirror Function: ON/OFF Switchable
- Video Out: 1.0Vp-p,75 Ω BNC
- Power: DC12V 800mA
- Safety & security, security automation, solution provider, system integration
- Use 1/3 inch SONY CCD chip
- 420 TV Lines, 4-9mm lens, with 36 pcs white lamps
- Waterproof and dustproof
- 1/3inch SONY CCD Color 420TVL IR 36 Lamps CCTV Wired Zoom Camera
- Capture your precious memories with this polaroid digital zoom camera
- 1/3 inch Sony CCD Chip, 420 TV Lines, 36pcs White Lamps, Day and Night Vision CCTV Secury Wired Color 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
- 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
- Do not attempt to disassemble the Camera
- Handle the Camera with care
- Do not use strong or abrasive detergents when cleaning the Camera body
- Never point the Camera toward the sun
- Do not operate the Camera beyond its temperature, humidity or power source ratings
- This equipment has been tested and found to comply with the limits for a Class A digital device. Pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment
- This equipment generates, users, and can radiate Radio frequency energy and ,if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications
- Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference in which case the user will be required to correct the interference at his own expense
- 1 x 1/3inch SONY CCD Color 420TVL IR 36 Lamps CCTV Wired Zoom Camera
If the order has not been shipped; please contact DinoDirect Live Support for order cancellation.You will get your refund within 24 hours.
If the order has already been shipped; you may return the item to us postmarked within 30 calendar days of delivery. Before that, please contact our Live Support to inform that.
In that case we will refund you the payment excluding actual shipping fees already incurred.
If the item is defective, please contact DinoDirect Live Support and send an email to us at firstname.lastname@example.org attached an image or video file clearly showing the defect of the product. And we will give you a response within 24 hours whether we will resend the item or refund the payment to you for compensation.
For customization, please consider carefully before ordering.Because we do not accept return and replacement.
|Unit Price||USD$ 47.24||USD$ 44.98||USD$ 42.72||USD$ 39.70|
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• If the order has not been shipped; please contact DinoDirect Live Support for order cancellation.You will get your refund within 24 hours.
• If the order has already been shipped; you may return the item to us postmarked within 30 calendar days of delivery. Please contact our Live Support to inform that.
• Please contact Live Chat or click here to learn more return policy.
- How is the Frame Rate related to Picture Quality?
Quality can refer to both how detailed the image is and how fast the frame rate is. Frame rate is simply a measure of how many individual pictures make up the video. "Full motion", what you see on television and on VHS tapes, is 30 frames per second, or fps. Most often, security systems record at slower rates, which result in more jerky-looking images but saves tape or hard drive space, allowing longer periods of time to be recorded.
- Why is Resolution important to consider?
Resolution refers to how detailed a picture the camera can see. The measurement to look for is horizontal TV lines (TVL). A normal CCTV picture is around 350 to 400 TVL, with high resolution getting up to 480 or 500. You need to make sure your entire system is capable of supporting that resolution. If your VCR records 350 lines and your monitor displays 400, the money you spent to upgrade to a camera with 500 lines is completely wasted.
- Why is Focal Lens important?
If you're looking for a security camera for the office or warehouse and you want to see as much as you can, you should look for a 2.8 or 4mm lens (provides a wide, somewhat distant view). If you need to observe a limited area, such as an entrance, you should choose an 8mm lense (provides a narrow view and objects are closer). In other words, the smaller the focal length number, the wider the field of view. To get the most flexibility in choosing the best field of view, consider a varifocal lens.