Real Time CCTV surveillance systems need the right lens
You need to ask yourself these key questions:
- Is the camera just going to be used for a wide coverage (say to cover the parking lot at my business or my front yard) to monitor general activity with little detail?
- Is the camera going to be used to cover a specific narrow target area (say an entrance way or doorway) where I want to identify the face of the subject, and therefore need greater magnification?
Here are some steps that may be useful in determining the best focal length security camera:
If you want more magnification then you would choose the longer focal length, if you want a wider coverage area then choose the smaller focal length. For example, let’s say that you have a security camera and your target distance is 25 ft. and your desired target width is 15 ft. Remember, there is a trade-off between magnification of detail and coverage area!If you want a better chance of identifying your subject at a distance you might want to go with the stronger focal length of say 16 mm to give you better detail. Keep in mind though, the field of view will be narrower which entails a smaller coverage area. For security camera with the target distance at 25 ft., using a 16 mm lens gives you are coverage width of only 7.5 ft. This lens may help you get a subject’s face in detail, but you may just miss him if he doesn’t walk through the narrow target area! (This high magnification focal length might be good for a doorway or entrance that is a narrow target area is or if your target is at a greater distance).
To learn more or book a free consult, contact Security Video Technology (SVT) today. We are a nationwide security solutions contractor and security surveillance integrator. Security Video Technology (SVT) is a nationwide security solutions contractor and security surveillance integrator. We are based out of the greater New Orleans area and service clients primarily along the Gulf Coast Region: Mobile, New Orleans, Baton Rouge, Lafayette, Gulf Port, and Beloxi.