A collapsible silicone lens hood is a type of camera accessory that is designed to fit over the front of a camera lens to block unwanted light and glare. It is typically made of silicone, which is a durable, flexible and heat-resistant material. The hood can be "collapsed" or folded down when not in use, making it more compact and easy to store. Silicone lens hoods are also often preferred over traditional plastic or metal hoods because they are less likely to cause scratches or damage to the lens, and they are also more lightweight and easy to transport. The main function of a lens hood is to block out stray light that can cause lens flare and reduce image quality. It also helps to protect the lens from accidental impact. The hoods come in different shapes and sizes, depending on the lens type, and it's important to make sure that the hood is the correct size for your lens.

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