How does the exposure triangle (aperture, shutter speed, ISO) work?

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Oct 13, 2025
How-To & Implementation

Trensix AI Synthesis

The exposure triangle consists of aperture, shutter speed, and ISO, which work together to control the brightness of an image. Changing one of these elements will directly impact the others and the final look of your image.

  • Aperture: Refers to the opening in the lens through which light passes to reach the camera's sensor. It controls the amount of light and depth of field.
  • Shutter Speed: Controls light and the depiction of motion. When you want to ensure your moving subject is perfectly sharp and clear, you need to use a fast shutter speed. Conversely, a slow shutter speed can blur moving elements within a scene, creating a sense of dynamism and flow.
  • ISO: Refers to the sensitivity of your camera's sensor to light. Unlike aperture and shutter speed, ISO is not a mechanical adjustment, but rather a digital amplification of the light signal captured by the sensor.

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