The knouspro el-30 is the result of a decade long project of electronic engineering.This model takes advantage of lcd technology that will let you browse through 10 interchangeable reticles for long range shooting, intermediate use tactical and hunting.Adj Size: .1 MILMagnification: 4-16xObjective: 44mmField Of View: 22.60-9.50 ft @ 100 ydsEye Relief: 3.30"-3"Tube Diameter: 30mmLength: 13.10"Weight: 23.39 ozReticle: Interchangeable ReticleParallax Adjustment: Interchangeable ReticleProofs: Waterproof/Fogproof/ShockproofCoating Type: Anti-ReflectiveOptic Coating: Fully Multi-CoatedOptic Coating: Fully Multi-Coated