What Is a DSLR Camera and How Does It Work?
DSLR stands for Digital Single-Lens Reflex. A mirror inside the camera reflects the light from the lens up to an optical viewfinder, so you see exactly what the lens sees.
Updated 10 November 2026
How a DSLR works
When you look through the viewfinder, a mirror sends the image up through a prism to your eye. When you press the shutter, the mirror flips up, the shutter opens and light hits the digital sensor. That is the "click" sound of a DSLR.
Main parts of a DSLR
- Lens and lens mount
- Mirror and pentaprism (or pentamirror)
- Optical viewfinder
- Shutter and image sensor
- Mode dial, command dials and screen
- Battery and memory card slot
DSLR vs SLR
An SLR uses film; a DSLR uses a digital sensor. The mirror and viewfinder design is the same.
Should you buy a DSLR in 2026?
Yes, if you want an affordable camera with long battery life and cheap used lenses: Canon EOS 2000D DSLR Camera (Rs 65,200) or Nikon D5600 DSLR Camera (Rs 94,100). If video and autofocus matter more, see DSLR vs mirrorless.
