The Swarovski 20x-60x Zoom Eyepiece for Swarovski spotting scopes sets the standard against which all other zooms must be measured. In addition to its obvious convenience, the Swarovski Zoom Eyepiece is proof that there is no inherent reason for a zoom lens to provide inferior images. In fact, at medium power, the zoom is one of the finest eyepieces available. At low power it is the equal of most wide angle, long eye-relief eyepieces, and the brightness, contrast, and detail that it provides at even the highest power must be seen to be appreciated. This is an excellent eyepiece from Swarovski, not just an excellent zoom eyepiece. Watertight Swarovski eyepiece with 20x to 60x zoom magnification. Bright and clear images right up to the periphery. Full field of view, even for spectacle wearers due to individually adjustable twist-in eye cups, removable for cleaning. This all adds up to make the Swarovski 20-60 Zoom Eye Piece to be a leader in eyepieces.