Posts Tagged ‘
varifocal’
Friday, September 2nd, 2011
There are basically three types of digital video cameras: 1) The dome camera; 2) The box camera; and, the bullet security camera. In this article we are going to focus our attention on the bullet security camera.
The bullet camera is versatile in its own way as a matter of function of how it is made. In other words, there are some features on bullet security camera that are definitely beneficial that come as standard on bullet cameras that may require extra charges to have on other type cameras.
Tags: aluminum, box camera, dome camera, varifocal, weatherproof
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CCTV Articles|
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Sunday, November 29th, 2009
For the novice, security cameras choices may seem confusing. One question often asked by customers is what is a Vari-Focal Lens? There are two basic types of CCTV lenses. You can either get a fixed lens, or a vari-focal lens. A fixed lens has a set aperture that cannot be changed. They can be used for overviews or for close up detail, but they cannot be used for both or be adjusted. When you purchase a fixed lens, you will want to use a lens caluculator to make sure you are getting a lens with the correct aperture since you cannot adjust it once you install it.
Tags: fixed lens, lens, varifocal
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CCTV Articles|
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