Swarovski ATS/STS HD spotting scopes are high-quality scopes featuring either 65- or 80-mm objectives lenses and available in angled or straight models. Featuring premium quality HD glass, the ATS/STS scopes use the 25-50xW and 20-60xS eyepieces, which are purchased separately. ATS/STS scopes are made of aluminum alloy frames and are completely fog- and waterproof.