In the CCTV Lens - Iris entry, what determines how much light enters the camera?

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Pass the California Alarm Company Operator Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

In the CCTV Lens - Iris entry, what determines how much light enters the camera?

Explanation:
The iris controls how much light reaches the sensor by setting the lens aperture. When the iris opens wider, more light can pass through, brightening the image; when it closes, less light gets in and the image darkens. Shutter speed affects exposure by changing how long the sensor is exposed, but not how much light actually enters the lens. Focal length changes the field of view and magnification, not the amount of light entering at a given iris setting. Resolution refers to how many pixels are captured, not to light amount. So the feature that determines how much light enters the camera is the iris.

The iris controls how much light reaches the sensor by setting the lens aperture. When the iris opens wider, more light can pass through, brightening the image; when it closes, less light gets in and the image darkens. Shutter speed affects exposure by changing how long the sensor is exposed, but not how much light actually enters the lens. Focal length changes the field of view and magnification, not the amount of light entering at a given iris setting. Resolution refers to how many pixels are captured, not to light amount. So the feature that determines how much light enters the camera is the iris.

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