Swarovski STS-65 HD Spotting Scope (Arca Swiss Foot)The Swarovski STS 65 HD Spotting Scope (Arca Swiss Foot) is built to the highest standard of optical quality. Nothing proves this better than the fluoride containing HD lens system that provides the absolute lowest chromatic aberration possible with superb color reproduction. The lenses are treated with the SWAROTOP coating to nearly eliminate light reflection and transmit an optimal amount of light to your eye. To protect the lenses from dust and oil