Film, as well as video, often exhibits a greater sensitivity to what is to us invisible, ultraviolet light. This is most often outdoors, especially at high altitudes, where the UV-absorbing atmosphere is thinner; and over long distances, such as marine scenes. It can show up as a bluish color cast with color film, or it can cause a low-contrast haze that diminishes details, especially when viewing far-away objects, in either color or black-and-white. Ultraviolet filters absorb UV light generally without affecting light in the visible region. It is important to distinguish between UV-generated haze and that of air-borne particles, such as smog. The latter is made up of opaque matter that absorbs visible light as well as UV, and will not be appreciably removed by a UV filter.The UV Protector shields lens from dust, moisture, scratches, and breakage.
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The Precision Design ET-60 Lens Hood is primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact. Dedicated lens hoods, such as the ET-60, are designed to match the specific focal length of the lens it was designed for. Compatible with the following Canon lenses: Canon EF 75-300mm f/4.0-5.6 USM Lenses; Canon EF 75-300mm f/4.0-5.6 II Lenses; Canon EF 75-300mm f/4.0-5.6 II USM Lenses; Canon EF 75-300mm f/4.0-5.6 III USM Lenses; Canon EF 75-300mm f/4.0-5.6 III Lenses; Canon EF-S 55-250mm IS Lens
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Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact. Dedicated lens hoods are designed to match the specific focal length of the lens it was designed for.
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Specially designed Lens Hood for the CANON EF SLR Cameras, 28-200MM f/3.5-5.6 Lens Provides adequate lens shade for outdoor shooting in bright light.
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Canon ET60 Lens hood, perfect for outdoor photography or in bright daylight. Compatible with the CANON EF 75-300mm f/4.0-5.6 USM, II, II USM, III & III USM Lenses
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DMW-LA4 Conversion Adapter
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The addition of a lens hood can help prevent flares--those circles of light that can accompany images where a strong light source is just outside the fame. These type of lens flares occur when indirect light rays pass through the front lens elements but don't make it all the way through to the image sensor. Opteka's ES-71II Lens Hood is designed for the Canon EF 50mm f/1.4 USM SLR Lens. Lens hoods are primarily designed to prevent unwanted stray light from entering the lens by extending and shading the end of the lens. In addition, since the end of the lens is extended, you also get the added benefit of some extra protection from accidental impact. This dedicated lens hood is designed to match the specific focal length of the lens it was designed for.
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One of the most important accessories for each lens you own. A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles.
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Canon is a leader in professional business and consumer imaging equipment and information systems. By developing innovative, high-quality business solutions Canon makes it easy to create, manage, and share images and information better, faster, and more efficiently.This product is designed for EF-S17-85mm F4-5.6 IS USM.For a complete compatibility list please refer to the original manufacturer's web site.
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