Aztec Optics Emerald 5.5-25x 50 DYND-1 (MOA). Second Focal Plane. 30mm tube. Comes with push-on Sidewheel for easy adjustment of side parallax, rubber lense covers, sunshade and flip-up lense covers. Turrets are adjustable once they are pulled out and remain in position when pushed back down. Reticle has 30 half mil dot markings for drop off. Comes with a lifetime warranty. A short demonstration of the 3-18 x50 version of this scope is available on YouTube, search "derwent air rifles aztec".