FAQ: What Is Horizontal And Vertical Lens On Cctv Camera?

0 Comments

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 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.

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.

You might be interested:  FAQ: How To Install Wireless Cctv Camera?

What is the best resolution for CCTV camera?

Any resolution over 1 million pixels is considered ‘megapixel’. In the case of megapixel cameras, the labels are approximate. Most Popular CCTV Resolutions.

Term Pixels (W x H) Notes
1080p HD 1920 x 1080 1080p High Definition
3 MP 2048 x 1536 3 Megapixel
4 MP 2688 x 1520 4 Megapixel
5 MP 2592 x 1944 5 Megapixel

12 

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.

What is the difference between 2.8 mm and 3.6 mm lens?

A 3.6mm lens is designed to provide an approximate 78° field of view and is the perfect camera in most CCTV applications. Most people think that a 3.6mm lens won’t show a large field of view, but as you can see from the below images, there’s not a huge difference between a 2.8mm and 3.6mm lens.

What is a 90 degree viewing angle?

The 90 ° field of view captures all of the objects but in lesser detail. As you can see in the example images above, the camera with 90 ° field of view captures all 3 objects in the scene, though each object takes up a small part of the camera image.

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.

You might be interested:  Question: Which Home Security System Came First Cctv Or Burglar Alarm?

What is the range of a CCTV camera?

They normally quote two figures, the number of TVL and the IR range. This might be called the night time range. IR range is a largely made up number based around how far away from the camera Infra red light can be detected.

2.8mm lens 1.5 metres
6mm lens 5 metres
9mm lens 6 metres
12mm lens 7 metres
22mm lens 12 metres

What are the 4 types of cameras?

Different Types of Cameras

  • Compact Cameras.
  • DSLR Cameras.
  • Mirrorless Cameras.
  • Action (Adventure) Cameras.
  • 360 Cameras.
  • Medium Format Cameras.
  • Traditional Film Cameras.

What is the best type of CCTV system?

The 9 most popular types of CCTV cameras available are:

  • Bullet CCTV Cameras.
  • C-Mount CCTV Cameras.
  • PTZ Pan Tilt & Zoom Cameras.
  • Day/Night CCTV Cameras.
  • Infrared/night vision CCTV Cameras.
  • Network/IP CCTV Cameras.
  • Wireless CCTV Cameras.
  • High Definition (HD) CCTV Cameras.

Which is better NVR or DVR?

As NVR recorders receive a pure digital signal from the cameras, video quality is better than compared to a DVR at the same resolution. In addition, as Ethernet cables carry audio, all cameras with microphones could record audio to the NVR.

Which is better 5MP or 4K?

The higher the security camera resolution, the better image quality and more vivid details you will obtain. So it’s easy to conclude that 4K IP security cameras deliver sharper and clearer images than 5MP IP security cameras, 1080p IP security cameras and 720p IP security cameras.

Is 1080p good enough for CCTV?

1080p Full HD Security Cameras High definition security cameras have achieved incredible success in the consumer market and continue to be a reliable monitoring option for general-purpose video surveillance. 1080p security cameras produce images with a resolution of 1920×1080, and are considered high definition.

You might be interested:  Often asked: What Photoshop Filter To Simulate Cctv?

Is 1080p good for CCTV?

1080p Full HD security cameras produce images with the resolution of 1920*1080. They are suitable for the general-purpose video surveillance but sometimes may fail to figure out small details from a distance.

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Post