Binoculars - Best To Business
Source:Ruilong Time:2011-3-17Now, the quality of the good binocular depends on the contrast, sharpness and the intensity of light. All these are dependant on the lenses and prisms of the binocular. This is why most of the professionals prefer the binoculars. For, they are the leading brad in the manufacturing of the binoculars in the world and their fame comes mostly because of the quality of their lens and prism.
One of the very important factors that decide the optical precision of the binocular is the field of view or what is also called as the angle of view. Basically, this tells you how wide an area you will be able to see with the help of a particular binocular. Generally, this is measured in degrees. Also, the field of view can be expressed in metres when a person views an area from 1000 metres. Now, if you are going to observe wildlife, sports, or any moving object, it is important that your binocular has a wide field of view. In this regard, the binoculars have brands like 7x35 DPS I with which you can view 162 metres from the distance of 1000 metres.
Another very important factor for good binocular is of course the lens. Ideally, this lens should aspherical. If made properly, the aspherical lenses will prevent all the distortion and at the same time, will ensure plasticity, bright pictures, and sharp contours. Now, you will be happy to learn that the binoculars have the aspherical lenses in most of their products.
Finally, there is the question of the prisms. In the high performance binoculars, the prisms are coated in such a way as to preserve the image detail and the brightness. Basically, they are a special type of optical glass that refracts the minimum amount of light and thus retain the clarity of the image. There are basically two different types of prisms available - the porro prism and roof prism. The former presents three dimensional images and occupies greater space, while the later offers reduce the image to present compact image.
Source: Compact Porro Binoculars , Monocular Telescope
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