: When you press the shutter button, the mirror flips up. This allows the light to hit the digital sensor directly to record the image.
: This term describes the mirror's action of reflecting light up to the viewfinder so the photographer sees exactly what the lens sees in real-time with no digital lag. Key Features DSLR Camera
: Light enters through a single lens and hits a mirror angled at 45 degrees, which reflects it upward through a prism (pentaprism) and into an optical viewfinder (OVF). : When you press the shutter button, the mirror flips up
A Digital Single-Lens Reflex (DSLR) camera is a digital camera that combines traditional optics and a mechanical mirror system with a digital image sensor. How It Works DSLR Camera