According to the Best Binoculars website, Porro prism binoculars are manufactured by a number of brand name companies, including Swift, Nikon, Canon and Bushnell. Porro prism binoculars are prized for providing the clearest, most optically correct and sharpest images for users.
Swift 8.5x44 Audubon ED Binoculars
The Swift 8.5x44 just claimed the Best Birding Binocular award for 2010 from Best Binoculars, and offers a high-quality image for observing birds. The model comes with extra-low dispersion glass (ED) that displays a clear and sharp image of what is being viewed. The body is rubber-coated and is made of magnesium alloy, which reduces the weight from previous models of the same kind.
Nikon 10x25 Ecobins Binoculars
The Nikon 10x25 is built using lead-free glass and non-chloride rubber, inks and dyes. According to the Best Binoculars website, the Ecobins Binocular is eco-friendly because it "comes with a 100% natural Lenzing fibre case and Fiberstone tree-free packaging, meaning that no trees were harmed in the production of box." The binoculars weigh 280ml, and are waterproof and fogproof. The body is covered in a rubber armoured coating, while the field of view is 262 feet wide at a 1,000-foot distance.
Canon 12x36 IS II Image Stabilized Binoculars
This model provides a magnification of 12x with a large objective lens. It is a smaller product compared to previous Canon binoculars, but has exceptional power. Image stabilisation technology gives users a steady image. According to Canon, once the binoculars have been shaken off the intended object, it only takes two-thousandths of a second for the mechanism to correct incoming light path and hold a stable image. The binoculars use batteries for this feature.
Bushnell 7x50 Marine Binoculars
The Bushnell 7x50 binoculars are O-ring sealed and nitrogen-purged to guard against any moisture that could harm the product. They are waterproof, will float in water and are the ideal choice of binoculars for marine use. A signature feature of this model is a rangefinder, which allows the user to work out the distance to a given object. According to the Best Binoculars website, "the rangefinder is a reticle that you will see when you look through the binocular. The vertical scale (reticle) is visible above the compass display through the left half of the binocular and allows you to calculate distance to an object if you know or can estimate its height."
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