Resolution

Sentinel & Vanguard Resolution

The resolution of a camera measures the amount of detail the camera's images will pick up. In standard digital video, the resolution is measured in pixels. The Sentinel's and Vanguard's ability to display clear details, however, is a product of the 22x optical zoom. These cameras don't need the high resolution that a purely digital zoom camera would need.

A more old-fashioned way of looking at resolution involves looking at the lines of resolution. Analog transmission of a video signal is based on lines, and the TVL (TV lines) number represents how many lines can be resolved on a display (TV, VCR, etc.). Drawing a comparison between analog and digital measurements, the TVL will be approximately half the number of horizontal pixels. And, indeed, we see that the Sentinel's and Vanguard's (H) pixels are 811 and the TVL measurement is 480.

480 TVL is about the same resolution you get from a VCR. The Sentinel and Vanguard has no strong need for a high resolution because the image quality is already high. The quality and clarity of the image from the Sentinel and Vanguard is brought to you by the 22x optical zoom. While standard digital video recording would simply crop and enlarge the image you wish to get a close-up on, the Sentinel will actually zoom in to bring you closer to the image, producing a much clearer image than could be achieved by simply raising the picture's resolution. However, the Sentinel and Vanguard are multi-tasked capable and able to provide an additional 22x digital feature that can be combined with the 22x optical zoom giving it a total of 44x viewing.|

The Vanguard camera is basically the same camera as the Sentinel except the Sentinel is in a doom making it an excellent outdoor or attractive indoor ceiling camera. View examples of both cameras resolution (including nightvision) on the following page. Click HERE