The firefield lm 10x42 binocular features roof prism optics, it brings the target and action closer than ever, while its large, multi-coated objective lenses obtain vivid images.Whether used during bird watching, scanning the field of battle or tracking long-distance prey.The lm binocular is equipped with retractable eye cups for ultimate comfort and customization.Nitrogen-filled and weather resistant, this binocular is built for reliability; ensuring users get the most out of every use in the field.The exterior is coated with a rubberized armor for a solid grip and protection against minor impact.Includes a carrying case, neck strap, lens cover and lens cloth.Case: YesMagnification: 10xObjective: 42mmField Of View: 91 m @ 1,000 ydsEye Relief: 10mmExit Pupil Diameter: 4.20mmPrism Type: BaK-7 RoofWeight: 15 ozFinish: Black Rubber ArmorTwilight Factor: 20.5Focus Type: CenterOptic Coating: Fully Multi-CoatedProofs: Weather Proof