Experience unparalleled clarity and focus with the TV Ethos 17mm from TheTelescope Factory, your gateway to VISION TO INFINITY. The 17mm Ethos is an ideal complement to the 31mm Nagler Type-5, offering parfocal convenience with focus locations about 3/8" above shoulder and exactly twice the true field area compared to its Nagler counterpart. Each Tele Vue Ethos eyepiece, including the 17mm, boasts proprietary tuned full multi-coatings, blackened lens edges, high index glasses, fold-down eyeguards, and a rubber grip for superior observation comfort and precision. Elevate your astronomical observations with the quality and innovation that Tele Vue is renowned for.