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词汇 Lens shade
分类 英语词汇 英语翻译词典
释义

Lens shade

中文百科

遮光罩 Lens hood

（重定向自Lens shade）
遮光罩的作用
Scheme of a lens with lens flare. A lens hood is designed so that it does not block the angle of view of the lens. Lens hoods block the Sun or other light source(s) to prevent glare and lens flare.
A selection of lens hoods: one cylindrical, one conical and three petal ones (one of them is chopped).

遮光罩是摄影时装在照相机镜头前，用以遮挡多余光线，防止发生镜头眩光的装置。多为金属、塑料等材质。形状多为花型和圆筒状。使用遮光罩能够有效防止镜头周围干扰光进入镜头，提高成像的清晰度与色彩还原。主要用于逆光拍摄。

另外遮光罩可以保护镜头，起到一定防雨、防碰效果。

英语百科

Lens hood 遮光罩

（重定向自Lens shade）
Scheme of a lens with lens flare. A lens hood is designed so that it does not block the angle of view of the lens. Lens hoods block the Sun or other light source(s) to prevent glare and lens flare.
A selection of lens hoods: one cylindrical, one conical and three petal ones (one of them is chopped).
Chopped petal lens hoodConical lens hoodNo lens hoodCanon EF 70–300 mm f/4–5.6 IS USM lens

In photography, a lens hood or lens shade is a device used on the front end of a lens to block the Sun or other light source(s) to prevent glare and lens flare. Lens hoods may also be used to protect the lens from scratches and the elements without having to put on a lens cover.
The geometry of a lens hood is dependent on three things: the focal length of the lens, the size of the front lens element and the dimensions of the image sensor or film in the camera.
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