Celestron 10x50 OptiView LPR Series, Weather Resistant Porro Prism Binocular with Integrated Light Pollution Reduction (LPR) Filters, with 7.0° Angle of View, U.S.A.

Celestron OptiView LPR binoculars have built-in light pollution reduction (LPR) filters designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light (see chart to the right). This includes mercury, and both high and low pressure sodium vapor lights common in most city street lights. In addition, they block unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow). As a result, OptiView LPR binoculars darken the background sky, making deep-sky observation of nebulae, star clusters and even galaxies possible from urban areas. While blocking unwanted light, OptiView LPR binoculars permit the transmission of more desirable wavelengths including hydrogen alpha, hydrogen beta, doubly ionized oxygen and ionized nitrogen. This will improve your views of emission nebulae, both from urban and rural settings. Some examples of objects that will show improved contrast are: the Orion Nebula, the Andromeda Galaxy and the Lagoon Nebula. Celestron OptiView LPR Filters are made of high quality, flat, polished optical glass with over 40 layers of coating. They're also protected with a broadband anti-reflection coating to prevent ghosting and to improve contrast. Celestron OptiView binoculars carry a Limited Lifetime Warranty.