What is described by the exposure triangle in digital photography?

• A. Aperture controls light amount and depth of field; shutter speed controls exposure duration
• B. Shutter speed only
• C. Aperture, Shutter Speed, and ISO jointly determine exposure
• D. ISO controls color accuracy

Answer: (C)

Understanding the exposure triangle means recognizing that exposure in digital photography is controlled by three interacting settings: aperture, shutter speed, and ISO. Aperture determines how much light passes through the lens and also affects depth of field. Shutter speed decides how long the sensor is exposed to light, influencing motion blur. ISO changes the sensor’s sensitivity to light, with higher ISO making the image brighter but adding more noise. When you meter a scene and aim for a certain exposure, you balance these three: increasing one often requires adjusting the others to keep exposure consistent. This is why the description that mentions all three together as determining exposure is the best fit. The other statements individually focus on a single factor or misstate ISO’s role, which doesn’t capture how exposure is produced.