X10 Sentinel PTZ Camera

X10 Sentinel Resolution

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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 X10 Sentinel's ability to display clear details, however, is a product of the 22x optical zoom. The Sentinel simply doesn'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 X10 Sentinel's (H) pixels are 811 and the TVL measurement is 480.

480 TVL is about the same resolution you get from a VCR. The X10 Sentinel doesn't have a strong need for a high resolution because the image quality is already high. The quality and clarity of the image from the Sentinel 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.

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