Bresser Alpen Apex Rifle Scope 4.5-27x50mm 1 inch Tube Rifle Scope First Focal Plane WBDC-TACT Reticle Black. Fast focus eyepieces and generous eye relief are found on all models. This scope includes flip-open covers honeycomb filter cleaning pen and Picatinny rings. Specifications for Bresser Alpen Apex Rifle Scope 4.5-27x50mm 1 inch Tube Rifle Scope First Focal Plane: Manufacturer: Bresser Objective Lens Diameter: 50 mm Magnification: 4.5 - 27 x Reticle: WBDC-TACT Tube Diameter: 30 mm Reticle Focal Plane: First Focal Plane (FFP) Exit Pupil: 9.5 - 1.9 mm Field of View Linear: 22.2 - 3.8 ft at 100 yds Field of View Angle: 4.2 - 0.7 degrees Eye Relief: 100 mm Color: Black Adjustment Click Value: 0.25 in at 100 yds Adjustment Type: MOA Battery Type: CR2032 Optical Coating: Fully Multi-Coated Water Resistance Level: Waterproof Fogproof: Yes Gun Type: Rifle Features of Bresser Alpen Apex Rifle Scope: WBDC-TACT reticle 1st focal plane 30mm tube diameter 1/4 MOA click adjustments Fully multi-coated glass Waterproof fogproof shockproof Package Contents: Bresser Alpen Apex Rifle Scope 4.5-27x50mm 1 inch Tube Rifle Scope First Focal Plane Bresser 4015: Alpen Apex Rifle Scope 4.5-27x50mm 1 inch Tube Rifle Scope First Focal Plane WBDC-TACT Reticle Black