Zeiss Diascope zoom eyepiece 8.4-25.1 mm, 68-49.5 degree apparent field of view. Eye relief 18mm. LotuTec T* coating. Easy to adjust eye guard. With fluoride glass elements. Bayonet mount for Zeiss Diascope and APM adapter for 2" telescope diagonal. Comes with box, case, and papers. Excellent condition.