This German Engineered ZA 5 4-20x50 SF is a 4x to 20x variable zoom with a 50mm objective lens and comes with a MINOPLEX Reticle. Side focus Parallax Adjustment for accurate shot place and extended ranges. Standard features include: Lenses by Schott. Minox M* coating - up to 21 different layers applied to the glass surface to greatly improve light transmission, brightness, contrast, detail and color rendering. Windage and elevation knobs, finger adjustable with positive and precise retical movements of 1/4 MOA with zero resettable. Long four inch eye relief throughout the entire zoom range. Rubber cushioned fast-focus eyepiece. Smooth operating soft touch rubber variable power ring.