Based on the original Nagler design, with a 5.5mm focal length, the Tele Vue Nagler Type-7 Eyepiece features an eye relief distance of 18mm / 0.7", plenty of room for people who wear eyeglasses to see the entire field of view without actually touching the eyepiece. Built to Tele Vue's exacting standards, the Type-7 features antireflection fully multicoated optics to improve brightness, color rendition, and contrast. A a fold-down rubber eyecup helps to block stray peripheral light from interfering with the views and to further enhance contrast. A textured collar around the body ensure safe handling in the cold or while wearing gloves. The Type-7 has a barrel diameter of 1.25" to fit into the most common sized focusers and accessories, and is parfocal with all Tele Vue group 'B' eyepieces, allowing you to change eyepieces within the group without having to refocus every time.
- Full Type-7 range, even between 1.25" and 2" modes when used with the Tele Vue Hi-Hat 1.25" to 2" adapter
- All other 1.25" Tele Vue eyepieces when used with the Tele Vue Hi-Hat 1.25" to 2" adapter except 40mm Plössl