An SLR (single-lens reflex) camera is designed for enthusiasts or photographers who value accuracy and versatility over compactness. It uses a mirror and pentaprism system to allow the photographer to see exactly what the lens sees, providing precise through-the-lens composition. When a photograph is taken, the mirror lifts out of the way, and the image is captured on film or a digital sensor.
SLRs offer interchangeable lenses, more accurate metering and focusing systems, and greater creative control compared with smaller cameras. Despite their size, most SLRs can still operate in full automatic mode, making them accessible to beginners, though they are significantly larger than point-and-shoot cameras and won’t fit in a pocket.