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Anonymous
Anonymous asked in Consumer ElectronicsCameras · 2 months ago

what's this part of camera lens called? and what is its function? rain protection?

like the tip part, that hallow cup thing that comes out of the camera lens. sorry I dont know how to explain it. 

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  • Frank
    Lv 7
    2 months ago
    Favorite Answer

    It is called a lens hood and it's main purpose is to prevent flare.  Flare happens when a very bright light source shines onto the lens.  Flare shows up as a variety of different things such as a swath of color either concentrated in a specific area going across the frame or in severe cases, flare can create a hazy look over the entire image.  Another common form of flare shows up as repeating shapes equal to that of the aperture.  If you have ever seen what looks to be pentagons, hexagons, octagons, etc... this is internal flare.

    The lens hood works by blocking the strong light source and thereby putting the front element of the lens in shadow.

    The lens hood also adds a bit of protection to the front of the lens, especially if the hood is made from hard plastic or metal.  Some are made of soft rubber-like material that collapse for easy storage but they don't do so well for preventing flare or protecting the lens.

    You'll notice that the hood in the photo you posted is not perfectly cylindrical, but has cutouts.  This type of hood is called a tulip as opposed to the rubber type which is cylindrical.  The tulip shaped hoods are specifically designed not just a certain focal length but a specific model of lens. The cutouts allow the top & bottom of the hood to protrude out further to increase the amount of protection against flare.

    • Steve P
      Lv 7
      2 months agoReport

      Just to add a bit of clarity about the tulip hood. The cutouts are to prevent vignetting in the corners of the image at a wide angle focal length.

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  • 2 months ago

    Petal shaped hoods keep the orbs out of your pictures.

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  • Rick
    Lv 7
    2 months ago

    it shades the lens .........................................

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  • 2 months ago

    It is called a hood, or lens hood. It is to keep stray light like bright sunlight or spotlights from hitting the lens and causing reflections and flares in the images. It also protects the lens slightly from bumps and scratches.

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