Which camera setting controls the brightness sensitivity of the image sensor?

Which camera setting controls the brightness sensitivity of the image sensor?

• A. ISO
• B. Noise
• C. Aperture
• D. Shutter Speed

Answer: (A)

The setting that controls how sensitive the image sensor is to light is ISO. ISO determines how much the sensor’s signal is amplified after exposure: higher ISO makes the image brighter in the same lighting by boosting sensitivity, but it also increases digital noise, while lower ISO produces cleaner images but requires more light or longer exposure. Aperture affects how much light enters the lens and depth of field, and shutter speed affects how long the sensor is exposed to light, altering brightness and motion capture. Noise is the grainy effect you can see when ISO is raised, not the setting that controls sensitivity itself. So the brightness sensitivity of the sensor is governed by ISO.

The setting that controls how sensitive the image sensor is to light is ISO. ISO determines how much the sensor’s signal is amplified after exposure: higher ISO makes the image brighter in the same lighting by boosting sensitivity, but it also increases digital noise, while lower ISO produces cleaner images but requires more light or longer exposure. Aperture affects how much light enters the lens and depth of field, and shutter speed affects how long the sensor is exposed to light, altering brightness and motion capture. Noise is the grainy effect you can see when ISO is raised, not the setting that controls sensitivity itself. So the brightness sensitivity of the sensor is governed by ISO.