Swarovski 20-60xS Zoom EyepieceThe Swarovski 20 60xS zoom eyepiece fits all ATS STS and ATM STM 65 and 80 mm spotting scopes. Like all Swarovski scope eyepieces, the 20 60xS zoom eyepiece is completely watertight and attaches by a locking bayonet mount. Swarovski 20 60xS zoom eyepiece displays a field of view ranging from 108 feet (20x) to 60 feet (60x) at 1000 yards. Swarovski 20 60xS zoom eyepiece features a generous 17mm eye relief, twist out eyecup and an attached ocular lens