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
|
|
光学镜片 |
我们提供光学光学镜片instrument.Main的光学镜头，包括圆柱形的光学镜头，光学球面镜片，光学非球面镜片，光学棱镜，光学滤镜，光栅，光学窗口，光学镜片，光学元件，镜头，鱼眼镜头，宽广角镜头，长焦镜头，投影机镜头，转接环，转接筒，自定义镜头，贴牌等。 我们的光学镜头的规格如下： *材... |
|
|
鱼眼镜头 |
我们的鱼眼镜头的规格如下： * 37毫米0.42X鱼眼镜头的镜头; * 72毫米， 82毫米0.7X鱼眼镜头 |
|
|
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. ... |
|
|
Amici prism |
The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics ranging in size from 3-76.2mm. The m... |
|
|
波片 |
光学波片尺寸说明如下： 尺寸公差:+/-0.20mm to +0.01/-0.01mm 厚度公差:+/-0.20mmto +/-0.005mm 光洁度:80-50 to 10-5 面型: at 633nm lambda -- lambda/20per 25mm 通光孔径:80% -- ... |
供应产品
Same products
