Camera Lens

What is the main function of a lens in a security camera?

• Capture sound for audio recordings.

• Define the field of view (how much of the scene is seen).

• Connect the camera to the security system.

• Power the camera with electricity.

When adjusting the focus of a camera, what is being changed?

• The lens magnification.

• The image brightness.

• The distance between lens and sensor.

• The camera position on the wall.

How does the amount of light passing through a lens affect the quality of the picture in a surveillance system?

• The more light that passes through, the worse the quality of the picture

• The less light that passes through, the better the quality of the picture

• The more light that passes through, the better the quality of the picture

• The amount of light does not affect the quality of the picture

What factors affect the size and clarity of the image quality in a surveillance system?

• Distance from the scene

• Focal length

• Lighting and format

• All of the above

Why is the selection of a lens critical in a surveillance system?

• It directly affects the size, shape, and sharpness of the image

• It indirectly affects the size, shape, and sharpness of the image

• It has no effect on the size, shape, and sharpness of the image

• It only affects the lighting of the image

What type of camera has a focal length that cannot be adjusted?

• Zoom lens camera

• Interchangeable lens camera

• Fixed lens camera

• Wide-angle lens camera

Fixed lens cameras are most commonly used in:

• Outdoor areas with variable lighting

• Indoor spaces with a static viewpoint

• Situations requiring frequent zooming and framing adjustments

• Monitoring large areas with wide panoramas

What type of camera lens allows users to manually adjust the focal length?

• Fixed lens

• Zoom lens

• Vari-focal lens

• Wide-angle lens

Vari-focal lenses are typically used in:

• Indoor spaces with a fixed viewpoint

• Applications requiring flexible viewing angle adjustments

• Situations demanding high image quality and resolution

• Outdoor areas with harsh weather conditions

What type of security camera lens allows close-up view on a scene?

• Fixed lens

• Wide-angle lens

• Zoom lens

• Vari-focal lens