A lens hood is a device which sticks onto a lens, which helps shield the lens from stray light. They often have a flower-shaped design, which gives maximum protection while minimizing the vignetting on the image.

A lens hood has the following advantages:

  • Increased Contrast
  • Reduced Lens Flare
  • Lens and camera protection.

A Lens hood can have the following disadvantages:

  • Can amplify a "Flash Shadow".
  • Can shade the photographic target, if macro