Leupold SX-4 ProGuide HD Gen2, Straight Spotting Scope, 15-45X Magnification, 65mm Objective, Shadow Gray 185682 Built to deliver relentless performance and the best glassing experience all season long, the SX-4 Pro Guide HD spotting scope should find a home with diehard hunters and shooters. And like all Leupold spotting scopes, it's guaranteed for life.