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  • How to Select Telescopes

    Telescopes come in three varieties: Refractors, Newtonian Reflectors, and Catadioptrics. Each kind of telescope collects and focuses light so that it can be magnified or recorded, but each does so differently. All perform well when properly designed and manufactured, but each has its own special advantage. [More...]

  • How to Select Binoculars

    Quality is the most important "feature" of binoculars. In many cases the brand name is a guide to quality. Companies like Celestron, Leica, Minolta, Nikon, Pentax, Steiner, Swarovski, and Zeiss have spent decades earning a reputation for high quality optical products, and they are unlikely to produce a clearly inferior product. Other companies, like Tasco, Jason, and Bushnell have built a reputation on low price. [More...]

  • How to Select Microscopes

    Microscopes are one of most popular optical instruments for the hospitals, clinics, biology Labs, and pharmaceutical companies. Microscopes are available in dozens of specifications and with a multitude of different features. How to choose a microscope that best fit your needs? This buyer's guide is intended to help our customers who need some basic information about microscopes. [More...]

  • How to Select Spotting Scopes

    Magnification is the degree to which the object being viewed is enlarged. Magnification, or power, in a spotting scope is a function of the relationship of two independent optical systems — the optics of the spotting scope itself and the eyepiece being used. [More...]

  • How to Select Night Vision

    When discussing night vision technology, you need to know about its technology generations.

... Night vision is made possible by a combination of two approaches: sufficient spectral range, and sufficient intensity range. [More...]

  • How to Select CCD Digital Cameras

    These have the highest sensitivities and can take the longest images. Images have to be stacked in a computer to build composite shots. They can be color, or monochrome. Monochrome versions are typically higher sensitivity and are often used with LRGB or UVBRI filters depending on object and camera. They are often/usually cooled for lower noise. It is in these cameras that the chips can get really large and quite expensive. [More...]

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