OVL’s exotic 1.25″ ExtraFlat™ telescope eyepiece design combines high quality with a surprisingly compact design. The optical designer has successfully removed the peripheral field curvature, so you can enjoy a flat, distortion-free image right to the edge of the field of view. The Optical performance convinces with an excellent sharpness, high contrast and good color rendering.The eyepieces have oversized eye-side lenses for the largest possible field of view and a large 23mm eye relief for spectacle wearers.The adjustable eyecups allow a comfortable view.All lenses have a broadband multilayer coating and blackened Lens edges. The eyepieces are parfocal. The housing is made of high-gloss, black anodized aluminum with wide rubber grip rings. The barrel is equipped with a thread for 1.25″ filters. Scope of delivery: 27mm eyepiece with 1.25″ barrel Dust protection caps! Power supply and batteries are not included in the scope of delivery!