Exposure.

Follow a connection to understand how these ideas fit together.

• Factual relationship

  Aperture affects Exposure

  A wider opening increases the light reaching the sensor during the exposure.

  Conditions: Scene illumination, shutter time and lens transmission are held fixed.

• Factual relationship

  Shutter speed affects Exposure

  A longer shutter time collects light for longer.

  Conditions: The illumination is continuous and other light controls are unchanged.

• Factual relationship

  ISO contrasts with Exposure

  ISO changes camera response; light exposure describes what the sensor collects.

  This comparison works in both directions.

• Factual relationship

  Stops used for Exposure

  Stops express light changes as doubling or halving rather than unrelated setting numbers.

• Factual relationship

  Metering used for Exposure

  Meter readings provide a starting point for exposure choices.

• Factual relationship

  Exposure affects Highlight clipping

  Increasing captured light can push bright regions beyond the sensor recording limit.

  Conditions: Scene brightness and sensor limit are fixed.

• Factual relationship

  Exposure affects Image noise

  More collected light can improve the signal relative to noise.

  Conditions: Compare similar scene areas and rendering; avoid saturation of important highlights.

• Factual relationship

  Continuous light affects Exposure

  Scene illumination contributes light for the duration of capture.

• Editorial next step

  Exposure explore next Aperture

  Start with the control that changes the lens opening.

• Editorial next step

  Exposure explore next Shutter speed

  Next connect light collection with how movement is recorded.

• Editorial next step

  Image noise explore next Exposure

  Look at how much light was collected before judging ISO alone.