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