Nightforce NXS 5.5-22X56mm Rifle Scopes - 56mm objective lens provides maximum clarity and resolution across the entire magnification range. The wide magnification factor of the 5.5-22 series allows precision accuracy at the longest ranges, yet at 5.5 power remains highly effective for shots at close ranges.Nightforce was the first company committed to perfecting extreme magnification variable power scopes. Our years of experience perfecting long-range optics is evident in every scope we build.