Power:20-60× Objective Diameter:60mm Lens Coating:Fully Multi-Coated Field of View: m @1000m / ft @1000yds38 - 17m / 114 - 51ft Close Focus:7m / 23ft Eye Relief:18 - 13mm / 0.7 - 0.5″ Length:350mm / 13.8″ Weight:795g / 28oz Nitrogen Purged - Waterproof and Fog Proof.