The25-50x W Wide-Angle Zoom Eyepieceprovides a wide range of magnification forSwarovskiATS/STS spotting scopes. Its 65 apparent angle of view affords a broad look at the targeted area and makes it easy to find and track your subject. Waterproof and fogproof, this eyepiece is made to withstand the rigors of the field; you won’t have to stay home just because there’s a chance of rain in the forecast. It can operate in temperatures from -13F to 131F, and can be safely stored in even more extreme conditions at -22F to 158F.Swaroclean external hydrophobic coating resists moisture/debris and eases cleaning25-50x magnificationWide 65 apparent angle of view