Dynamic range in digital imaging refers to

• A. The range of luminance captured
• B. The number of color channels
• C. The pixel size
• D. The exposure index range

Answer: (A)

Dynamic range in digital imaging describes the range of luminance a sensor can capture with usable detail, from the darkest shadows to the brightest highlights, before clipping or becoming indistinct. It’s about how much tonal information the camera can reproduce across a scene's brightness levels. A camera with a wide dynamic range preserves detail in both very bright and very dark areas, letting you see texture in shadows while still holding detail in bright skies. This span is often measured in stops, with each stop representing a doubling of light, so more stops mean more gradation and less loss of detail as brightness changes. The other factors—color channels, pixel size, or exposure index range—don’t define this luminance range itself, though they can influence overall image quality in different ways.