These high-quality Helios ultra wide-angle telescope eyepieces allow breathtaking observation experiences and represent a strong competition for the leading premium manufacturers at a very reasonable price. The large 82° field of view and the superb correction of the field over the entire field of view as well as the excellent contrast in combination enable wonderful, intensive and long-lasting observation experiences. It works great in telescopes of all focal ratios. The eyepiece contains 7 lenses in 4 separate groups. This exotic eyepiece design includes large eye lenses and a soft, adjustable rubber eyecup for comfortable viewing. The eyepieces are fully multi-coated, the lens edges have been blackened and they are equipped with internal apertures and are parfocal. The eye relief is 12 mm. Beautifully finished in high gloss black anodized aluminum with knurled rubber handrims. The barrel is equipped with a 1.25″ filter thread. Scope of delivery: 16mm eyepiece with 1.25″ barrel Dust protection caps! Power supply and batteries are not included!