The Sightron SIII SS 8-32×56 LR Side Focus Riflescope is designed for serious outdoorsmen who demand reliability and repeat performance. The Sightron SIII SS 8-32×56 LR Side Focus Riflescope features a 30mm one-piece main-tube made from high quality aircraft aluminum. Tube thickness is more than twice as thick as one-inch models to provide maximum rigidity. The rifle scopes are waterproof, nitrogen filled and provide a lifetime of internal fog protection for inclement weather. A European style fast focus eyeball accompanies all Sightron SIII SS Long Range Riflescopes. A quick turn of the eyebell allows the user to focus in a matter of seconds. Tweaking the eye focus is just a small adjustment away.