What is varifocal lens in CCTV camera?

What is varifocal lens in CCTV camera?

What is the meaning of varifocal lens in CCTV cameras? Simply put, a varifocal lens is a lens that can zoom in and out. You can adjust the lens so that it captures a wider area or so that it focuses in more detail on a smaller area. Varifocal lenses come in various aperture sizes.

What is the difference between varifocal and motorized?

Compared with the conventional manual vari-focal lens, a camera has the motorized zoom lens can automatically adjust the focal length of camera to get clear auto focused image. This makes security camera installation become much quicker and easier.

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.

What is fixed camera?

Surveillance cameras are traditionally either fixed cameras, which provide a single view, or pan/tilt/zoom (PTZ) cameras, which provide several views and can be controlled remotely from a security control center. The panning and tilting of a PTZ camera are accomplished by the camera mount, not the camera itself.

What is the difference between fixed lens?

Part 1 – What’s the difference? A fixed lens doesn’t let you adjust the focal length, angle of view, and level of zoom. Almost all fixed lens security cameras have a wide-angle. With a varifocal camera, you can adjust these things.

How do I choose a CCTV lens?

How to Choose the Best Lens for Your Security Camera

1. Focal length and field of vision. The first specification to consider when choosing a security camera lens is its focal length.
2. Image format.
3. Monofocal, varifocal and zoom lenses.
4. Aperture.
5. Iris.

What is fixed CCTV camera?

Fixed view cameras These cameras come with a pre-configured lens which gives you a fixed field of view. With few moving parts, fixed view cameras provide a simple set up. If you’re unsure on which lens a camera contains, this is found in the technical specification on our product pages.

Is fixed focus camera good?

Fixed-focus lenses, also known as focus-free lenses, are designed to render everything in a scene in focus. Fixed-focus lenses are not the same thing as autofocus lenses. It is not an issue of lens quality, as many fixed-focus lenses have very good optics.

What is the role of Lens in a CCTV camera?

Role of the Lens: It is often said that a “security camera is as good as its lens”. The lens of a security camera determines how much area is covered by the camera. Choosing the correct lens for the CCTV camera is as important as choosing the correct security camera for a specific spot/need.

What is motorized varifocal lens?

Motorized Varifocal Lens. The M8ZB has a Motorized Varifocal Lens, ranging from 3.3mm to 12mm. This means you can easily and quickly adjust the zoom to your liking directly from the camera’s interface. The Motorized Varifocal Lens gives you more control over your image.

What is a varifocal camera?

varifocal lens cameras, is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to parfocal (“true”) zoom lens, which remains in focus as the lens zooms (focal length and magnification change).

What is field of view for CCTV mean?

The field of view (or FOV) is the total height and width of the view seen through the cctv security camera lens . It can also be referred to as the angle of view or the angular field of view.