NightStar Rifle Scope FIR 30mm Tube Side Focus Illuminated Reticle Black. 5-15X50 used latest technoloty made the scope more sharper with Integrated side focus and intensity knob make it more fasionable comb sunshade filter included Specifications for NightStar 2.5-15X50SFIR Rifle Scope: Manufacturer: NightStar Objective Lens Diameter: 50 mm Magnification: 2.5 - 15 x Reticle: Mil-Dot Tube Diameter: 30 mm Reticle Focal Plane: Second Focal Plane (SFP) Exit Pupil: 18 - 3.3 mm Illumination Color: Red Finish: Matte Field of View Linear: 43.7 - 7.3 ft at 100 yds Eye Relief: 3.9 in Color: Black Weight: 23.3 oz Adjustment Click Value: 1/10 Mil Rad Length: 328 mm Parallax: 100 yds Illumination Type: LED Width: 85 mm Height: 68 mm Focus Range: 25 yds to infinity Lens Material: Glass Optical Coating: Fully Multi-Coated Brightness Settings: 11 Battery Life: 70 - 100 hours Operating Temperature: 0 - 100 Fahrenheit Shockproof: Yes Fogproof: Yes Package Type: Box Gun Type: Rifle Package Contents: NightStar 2.5-15X50SFIR Rifle Scope NightStar NS251550: Rifle Scope 2.5-15X50SFIR 30mm Tube Side Focus Illuminated Reticle Black