- Fixed Lens: Fixed lenses have a specific focal length that remains constant. They provide a fixed field of view, meaning the camera captures a specific area without the ability to zoom in or out. Fixed lenses are often used in applications where the monitoring area is well-defined and does not require frequent adjustments.
- Varifocal Lens: Varifocal lenses offer adjustable focal lengths, allowing for manual adjustment of the camera's field of view. These lenses provide flexibility as they can be zoomed in or out to accommodate different monitoring needs. Varifocal lenses are commonly used in scenarios where the surveillance area may change or require occasional adjustments.
- Motorized Zoom Lens: Motorized zoom lenses provide remote control over the focal length and field of view of a camera. These lenses can be adjusted electronically, allowing for convenient and precise changes in zoom levels. Motorized zoom lenses are suitable for applications where frequent adjustments are necessary or when remote control is desired.
- Fixed-Focus Lens: Fixed-focus lenses have a fixed focal length and focus, typically set at the factory. They are designed for specific surveillance scenarios where the camera's focus is permanently set for a particular distance. These lenses are commonly used in areas with a consistent monitoring range and no need for manual focus adjustments.
- Pan-Tilt-Zoom (PTZ) Lens: PTZ lenses are typically used in PTZ cameras that offer remote control over pan, tilt, and zoom functions. These lenses provide the ability to rotate the camera horizontally (pan), and vertically (tilt), and adjust the zoom level. PTZ lenses are suitable for applications that require extensive coverage, flexibility, and the ability to track objects or individuals.
It's important to consider factors such as the desired field of view, focal length, zoom capabilities, and specific surveillance requirements when selecting a CCTV lens for a CCTV system. Consulting with a professional security provider or system integrator can help determine the most suitable lens option based on your specific needs.