A Use Case is a real photographic scenario that describes the requirements for a camera or a lens to shoot a certain type of photograph. DxOMark defines six Use Cases for scoring lenses and camera sensors (five for lenses, four for sensors): Travel & Family, Portrait & Studio, Landscape & Architecture, Reportage , Sports & Wildlife, and a general purpose use case to report sensor overall performance. Read more about Lens Use Cases or Sensor Use Cases definitions.
Too low exposure, resulting in a dark photo.
The fundamental quality characterizing a photon, equivalent to its energy. Differing visible wavelengths are perceived as different colors.