There are many factors to consider when choosing a type of CCTV (closed-circuit television) security camera for a installation. The most important factor is likely the intended use for the camera. For example, if you need to capture distant objects or worry about low-light conditions, then a bullet camera with night vision capabilities would be ideal. Or, if you need to covertly monitor an area, then a hidden camera may be necessary.rnrnOther important factors include the field of view that you need (measured in degrees), pixel density (measured in megapixels), lens size, and storage capacity.