Lens Hood/Lens Shade
In photography, a lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare.
The geometry of the lens hood can vary from a plain cylindrical or conical section (much like a lamp shade) to a more complex shape, sometimes called a petal, tulip, or flower hood. These more complex shapes of lens hood take into account the final image's shape and aspect ratio.[3] This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood, thereby reducing the amount of vignetting in the final image.
Ideally, lens hoods should increase in length, and therefore in efficiency, as the focal length of the lens increases and the angle of view reduces. Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood (away from the end of the lens) cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.
VY Optics could manufacture varied size of lens hood or lens shade,picture shown is 37mm.OEM is available,too.
All lens hoods are fit for Canon,Nikon,Olympus,JVC,Kadak,Fuji,Casio and so on.
Other supplier products
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非球面透镜 |
我们提供非球面镜片。
非球面镜片的规格如下：
材料：BK7或其他光学材料
尺寸：10mm - 200毫米
边缘：λ/ 2
中心厚度：15nm的，25nm的
弥散圆：0.03-0.2毫米
心：3弧分
表面质量:60-40划痕/开掘
通光口径：90... |
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分光镜 |
分光棱镜尺寸说明如下： *材料：BK7或者UV等级熔融石英 *尺寸公差：+/-0.1mm *角度公差：+/-3’or 30” *通光孔径：90% *光洁度：60/40 或者 20/10 *面型：λ/8 or λ/4 @633nm *倒角：... |
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Right angle prism |
Rectangular prisms are used to deflect a beam of light through 90 or 180 degrees. This can be used as component to create various optical devices. ... |
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窗口片（圆形&方形） |
光学窗口片的规格说明： *材料: BK7 或者其他材料 *长度公差:+/-0.01 *宽度公差:+/-0.01 *中心厚度公差:0.005mm *光洁度:80-50 to 10-5 Scratch/Dig *面型: *平行度<=1min -- 2sec *通光孔径:80% -- 100% |
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Lens Hood/Lens Shade |
In photography, a lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare an... |
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