By Raymond Shadman Custom Video Security 310-370-9500 x1 1. Define objective. What do you want to see, in what level of detail, and how far away? How many megapixels and what focal lengths are required to achieve viewing objectives? Are objects moving? If so, what size are they with respect to the field of view, and how fast are they moving? How many cameras will be on the system? (Most recorders or VMSes support a maximum number of cameras.) Will more cameras be added in the future? Are there multiple locations, and if so does the corporate headquarters want administrative control of each location? If so, would there be a network admin who would want to apply modifications to each location’s server in bulk using Federated Architecture (Milestone XProtect Expert or Corporate)? Will the system be recording on a schedule, continuously, on motion detection, or both? 2. System design. How many clients will be viewing the cameras simultaneously, and from inside or outside the network? (If a lot of clients viewing multiple cameras at a time on a Milestone Expert or Corporate system, a separate Mobile Server should be used.) Are clients PCs or Macs? Are mobile clients Android, iOS, […]
Read Now Our Panasonic-sensor EA-Series auto-iris varifocal-lens HD-SDI and HD-TVI IR bullet cameras now offer ALC. These HD-SDI cameras also offer True WDR and a superior image quality, with infrared distances of up to 300 feet using new matrix IR technology. ALC (Auto Light Control) Automatic Light Control (ALC) indicates the image sensor’s ability to automatically adjust in diverse lighting conditions to yield the most vivid video image possible. It allows the auto-iris circuitry to either take bright spots more into consideration (peak), bringing out detail in bright areas, or less into consideration (average) bringing out detail in shadows. For automatic brightness control in the ALC function, an auto iris lens with a voltage controlled aperture (DC) is necessary. ELC (Electronic Light Control) ELC compensates for moderate light changes in indoor applications without the use of expensive auto iris lenses. A fixed-iris lens or manual-iris lens can be used. ELC allows the changing of shutter speeds up to 1/100,000 second. This allows for sharper images, even in limited lighting conditions.
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