Why would Angle Coverage affects the quality of you cctv

For CCTV and IP camera, Angle Coverage describes the angle that a camera lens can image. The video image circle is produced by a lens, which is big enough to cover the CCTV camera image sensor completely. It is also possible to include some vignetting toward the edge.

If the angle coverage of the lens doesn’t completely fill the image sensor, the image circle will be obvious . Typically with strong vignetting toward the edge, and the effective view will be limited to the angle of coverage.

For CCTV camera, the Angle Coverage is determined by the focal length of lens and size of image sensor.

Given that the lense of a CCTV camera is the same, the bigger the image sensor is, the wider the Angle Coverage will be;
Given that the size of the image sensor is the same, the higher the number of focal length of the lens, the narrower the Angle Coverage will be.
Usually, the size of of image sensor of CCTV camera is 1/3″, or 1/2.5″. The focal length of lens is 2.8mm, 3.6mm, 4mm, 6mm, 8mm, 12mm.

With 1/3″ of image sensor, 2.8mm focal length will mean about 90° of coverage. 4mm focal length means about 70° coverage.  6mm means about 43.3°coverage .12mm focal length translates to about 20.6° coverage.

Note that different image resolution will also slightly affect the angle of coverage.

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The average home owner or prospective user definitely lacks the technical expertise needed to properly identify and choose the CCTV cable that is most suitable for his needs. Consequently, the intervention of a consulting firm that is capable of guiding the prospective clients in making the right decision is therefore by all means necessary. 

CCTV home is an example of such a company. It basically tests, evaluates and guides consumers in purchasing the right surveillance equipment. To get started, you can visit our website CCTV home or Contact Us is all that is necessary.  A member of its customer care department is always on standby and very eager to receive any incoming inquiries and act on them soonest possible.

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