Basic of CCTV

Overview: CCTV Camera Types and Technologies

This module moves from the general system to the most important component: the camera. The goal is to understand how cameras work and how to choose the right one for a specific job.

By the end of this module, you will be able to:

• Understand what determines a camera’s field of view and video quality.
• Recognize the most common types of CCTV cameras and their uses.
• Understand the key features that allow cameras to work in difficult conditions.

Here are the key areas we will explore:

• Lenses and Sensors: We’ll look at the “eye” of the camera, covering how lenses (fixed, varifocal) determine what the camera sees and how sensors (CMOS) capture the image.
• Video Resolution: We’ll explain the importance of resolution (HD, 4K) and why higher resolution is critical for capturing usable evidence.
• Camera Shapes and Designs: We’ll cover the main physical types of cameras (Dome, Bullet, PTZ) and explain the best environment to use each one.
• Special Features: We will explore modern camera technologies like Infrared (IR) for seeing in complete darkness and WDR for balancing scenes with bright light and dark shadows.

This module provides the practical knowledge needed to select and identify the correct camera technology for any security scenario.

Does this overview sound good? We can begin with the first topic, Understanding Camera Lenses, whenever you’re ready.