SIG SAUER SIERRA4-BDX 4-16x44mm 30mm Tube Rifle Scope Second Focal Plane Second Focal Plane BDX-R2 Digital Ballistic Reticle Black. With a digital focal plane and 194 LED hold points the SIERRA4-BDX brings unmatched accuracy connectivity and clarity to the field. Specifications for SIG SAUER SIERRA4-BDX 4-16x44mm 30mm Tube Rifle Scope Second Focal Plane: Manufacturer: SIG SAUER Objective Lens Diameter: 44 mm Magnification: 4 - 16 x Reticle: BDX-R2 Digital Tube Diameter: 30 mm Reticle Focal Plane: Second Focal Plane (SFP) Illumination Color: Amber Field of View Linear: 1.25 - 5 ft at 100 yds Eye Relief: 2.4 - 3.2 in Diopter Adjustment Range: -2 - 2 dpt Color: Black Weight: 22.7 oz Adjustment Click Value: 0.25 MOA Length: 12 in Adjustment Type: MOA Illumination Type: LED Battery Type: Lithium Metal CR2032 Fabric/Material: Aluminum Adjustment Range: 70 MOA Light Transmission: 95 percent Weather Resistance: Waterproof Water Resistance Level: IPX-7 Battery Quantity: 2 Magnification Type: Variable Condition: New Features of SIG SAUER SIERRA4-BDX 4-16x44mm 30mm Tube Rifle Scope Second Focal Plane BDX Ballistic Data Xchange Technology: Pairs with KILOBDX rangefinders to calculate and display an exact holdover dot using real-time ballistic and environmental data. BDX-R2 Digital Reticle: 194 individually controlled LEDs on a digital focal plane for hyper-precise aiming. SmartBDC Technology: Choose from 9 onboard ballistic groups or customize your setup for total control. Advanced Bluetooth Antennae: Improved connectivity up to 30 yards - perfect for shooter-spotter pairs when terrain dictates your position. Rugged Performance: Waterproof (IPX7) 30mm main tube and ultra-clear optical system with up to 95percent light transmission. Package Contents: SIG SAUER SIERRA4-BDX 4-16x44mm 30mm Tube Rifle Scope Second Focal Plane SIG SAUER SOSBDX44111: SIERRA4-BDX 4-16x44mm 30mm Tube Rifle Scope Second Focal Plane Second Focal Plane BDX-R2 Digital Ballistic Reticle Black