Now, exceptional precision at extended ranges made possible by higher magnification is available at a reasonable price. While the quality of many lesser variable-power riflescopes deteriorates dramatically at high magnifications, our 5-20 x 56 provides superb clarity, crispness and color contrast throughout its entire range, from minimum to maximum. ZeroSet(TM) is standard, allowing a rapid return to your chosen zero even after multiple elevation adjustments. Mfg: Nightforce SPECS: Focal Plane: Second,Overall Length: 15.2", Tube Diameter: 30mm, Eyepiece Outer, Diameter: 43mm, Mounting Length: 6.5", Weight: 29.1oz (non-illuminated) 30.5oz (illuminated), Exit Pupil Diameter: 5x: 8.7mm 20x: 2.5mm, FOV @ 100 yds: 5x:17.9ft 20x:5ft, Eye Relief: 3.5-3.54", P