FAQ: How To Choose Cctv Camera Lens?


What size CCTV lens do I need?

A security camera lens size determines the field of surveillance view and zoom level that the camera provides. A 3.6mm lens is designed to provide an approximate 78° field of view and is the perfect camera in most CCTV applications.

Which is better 2.8 mm or 4mm?

Although it has more clarity at a further distance, the 4mm lens shows a similar scene to the 2.8mm. The main difference is the reduced angle of view which gives the illusion that objects are closer to the camera. A 4mm lens is useful for detection & identification.

How do I choose the right lens for my security camera?

The Pro’s Golden Rules to Selecting the Right Lens – If the viewing area is under 50ft from the camera, select a 3.6mm fixed lens. – If the viewing area is 5-150 feet from the camera, select a camera with 2.8-12mm zoom lens. – If the area is 20-400 feet from the camera, consider PTZ cameras with a motorized zoom lens.

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What does 2.8 mm lens mean?

This is the difference in the fixed lenses on the unit. 2.8mm gives you the widest view and is generally the most common, 12mm gives a zoomed in image. So if you are putting the cameras in a tight room go with the 2.8 if you want to see down a long hallway or view far away go with a higher one.

How far can a 2.8 mm lens see?

In general a 5MP 2.8mm lens will offer you around 105° field of view and a 5MP 4mm lens will offer you an 87° field of view.

How much area does a CCTV camera cover?

C-mount cameras can cover distances beyond 40 ft thanks to the possibility to use special lenses with these cameras, whereas standard CCTV lenses can only cover distances of 35-40 ft.

Which type of CCTV camera is best?

Top 7 Types of CCTV Cameras To Suit Your Requirements.

  1. Dome Camera. The most economical among the lot, Dome camera is the basic type of security camera, which is meant for indoor installation.
  2. Bullet Type Cameras.
  3. C-mount camera.
  4. Day/Night CCTV Camera.
  5. Infrared/Night Vision CCTV Camera.
  6. Varifocal Cameras.
  7. Wireless cameras.

How far can a 12mm lens see?

At 12mm you will achieve around a 30° angle of view and identification at around 50 feet. The real trick is that this lens can be set to anywhere between those two different focal lengths.

What is the viewing angle of CCTV camera?

The Different Viewing Angles For Your Camera Standard/Medium: Lenses covering a viewing angle of 60 to 25 degrees, representing an effective focal length of 25mm to about 65mm. Telephoto: Lenses which cover a viewing angle of 25 to 10 degrees, which corresponds to a focal length of 65mm to 160mm.

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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.

How many types of CCTV lenses are there?

Types of Lenses: There are three basic types of lenses for a camera – fixed, varifocal, and zoom. Each type of lens has characteristics that differ from the others, and each has their place, depending on the application.

What do mm mean in camera lenses?

What is Lens Focal Length. Focal length, usually represented in millimeters ( mm ), is the basic description of a photographic lens.

What does F 2.8 mean in photography?

It means the aperture ring is opened at f 2.8. It means you will get more light to the sensor and more bokeh but you will get lesser depth of field (The area in focus). Generally this kind of open aperture is used for portrait photography.

What does lens mean in CCTV?

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.

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