The Swarovski 20x-60x Zoom Eyepiece for Swarovski spotting scopes raises the bar which all other zooms should be measured. Swarovski's newest eyepiece designs are heavy duty, lightweight and brilliant performers meant for a lifetime of service. Helicoid-type eyecup designs accommodate those with and without eyeglasses. In addition to its convenience, the Swarovski Zoom Eyepiece is proofimage that there is no inherent reason for a zoom lens to provide inferior images.