What does SLR stand for?

• A. Special Lens Range
• B. Single Lens Reflex
• C. Separate Light Refraction
• D. Standard Light Relay

Answer: (B)

The concept here is recognizing common camera terminology. SLR stands for Single Lens Reflex, describing a camera design that uses one optical lens for both viewing and capturing the image. A reflex mirror and a prism system directs light from that single lens up to a viewfinder, so you see exactly what the lens will capture. When you press the shutter, the mirror flips out of the way and the light hits the sensor (or film), forming the photo. That single-lens, reflex-viewing setup is what defines an SLR. The other terms aren’t standard camera terminology, so they don’t describe how the camera actually works.