NightStar 3-30x56SFIR 30mm Tube Rifle Scope Second Focal Plane Illuminated Reticle Black. It features a 56mm objective lens diameter and a 30mm tube diameter with a Mildot reticle type and second focal plane. The scope is waterproof shockproof and fog proof making it suitable for use in a variety of weather conditions. It also has a glass illuminated reticle and turret loackable. The single-piece chassis and FMC lens provide durability and clarity Specifications for NightStar 3-30x56SFIR 30mm Tube Rifle Scope Second Focal Plane: Manufacturer: NightStar Objective Lens Diameter: 56 mm Magnification: 3 - 30 x Reticle: Illuminated Tube Diameter: 30 mm Reticle Focal Plane: Second Focal Plane (SFP) Illumination Color: Red Green Finish: Matte Field of View Linear: 34.1 - 3.41 ft at 100 yds Eye Relief: 3.8 - 4.7 in Color: Black Weight: 30 oz Adjustment Click Value: 0.125 MOA Adjustment Type: MOA Illumination Type: Fiber Optics Battery Type: CR2032 Optical Coating: Fully Multi-Coated Shockproof: Yes Fogproof: Yes W/E Travel at 100 Yds: 60 MOA Features of NightStar 3-30x56SFIR 30mm Tube Rifle Scope Second Focal Plane Turret lockable 3-30x 10 times variable power Package Contents: NightStar 3-30x56SFIR 30mm Tube Rifle Scope Second Focal Plane NightStar NS11211: 3-30x56SFIR 30mm Tube Rifle Scope Second Focal Plane Illuminated Reticle Black