The first specification to consider when choosing a security camera lens is its focal length. The focal length of a lens determines both the range and distance of its field of vision. The basic rule to remember is that a smaller focal length will lead to a wider viewable range.
How do you calculate the focal length of a CCTV camera?
- W (horizontal width) = (distance) * 3.2 mm / (Lens Focal Length)
- HorizontalAngle= 2 * arctan(SensorSize/(FocalLenght * 2))
- Watch Video Tutorial.
- Download trial version of IP Video System Design Tool [for Windows 11/10/8/7, 365 MB]
What type of lens is used in CCTV camera?
There are two main CCTV camera lens types: fixed lens (aka. monofocal lens) and varifocal lens (these include motorised lenses). A CCTV security camera that has a fixed lens is permanently set, meaning that its angle of view, focal length and level of zoom cannot be changed.Jul 24, 2020
What is C mount CCTV camera?
A C-mount allows the photographer to quickly and easily switch out lenses, which fit onto the camera body with filter thread mountings or an adapter. The C-mount adapter is the lens mount most typically found on closed circuit television cameras (CCTV), machine vision cameras and microscopes.Apr 28, 2020
What is the difference between C mount and CS mount lens?
The difference between C mount and CS mount is flange focal lengthflange focal lengthFor an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), or register, depending on the usage and source) of a lens mount system is the distance from the mounting flange (the interlocking ...https://en.wikipedia.org › wiki › Flange_focal_distanceFlange focal distance - Wikipedia that from lens mount to image plate. ... CS mount lens cannot use for C mount lens due to the focal length difference and cannot get focus image. Please check lens mount of camera when selecting lens.May 21, 2018
How many types of lenses are present in CCTV?
There are two main CCTV camera lens types: fixed lens (aka. monofocal lens) and varifocal lens (these include motorised lenses). A CCTV security camera that has a fixed lens is permanently set, meaning that its angle of view, focal length and level of zoom cannot be changed.Jul 24, 2020
How does CCTV lens work?
The simplest CCTV lens is a piece of glass (or plastic) to focus the light from the outside world onto the camera's imaging sensor. This lens' only adjustable mechanism is its focus-ring, part of the barrel body, which you turn until your image is as clear as possible.Jan 29, 2014