1、MULTILATERAL COATED OPTICAL GLASS: Astronomical telescope eyepieces are fully multilayered with broadband coatings and optical glass to provide you with clear images, good color correction and contrast. Multi lens design provides maximum brightness and high clarity. 2、68 DEGREE WIDE ANGLE: Astronomical telescope eyepieces have a 68 degree wide angle field of view, suitable for viewing and skywatching use, especially for observing large deep sky objects, providing high light transmission and excellent image quality. 20mm focal length astronomical telescope eyepiece with a wide field of view and superior performance. 3、EXTINCTION DESIGN: The special extinction design inside the 1.25 inch eyepiece tube can effectively eliminate light scattering and provide clearer observation images. At the same time, it supports the connection of 1.25 inch filters, providing more observation options. 4、USING SCENARIO: Astronomical telescope eyepieces are suitable for all astronomical telescopes with 1.25 inch interface. It can be used for observing a variety of celestial objects, such as the lunar surface, planets, nebulae, star clusters, diffuse nebulae, and more. With high brightness and large field of view, it is very comfortable to observe. 5、INCLUDED STORAGE CASE: The astronomical telescope eyepiece comes with a sturdy plastic storage case, which can effectively protect the eyepiece from dust and moisture. Easy to carry and store. Item Type: Telescope Eyepiece Material: Aluminum, Optical Glass Weight: Approx. 123g / 4.3oz Focal Length: 20mm / 0.8in Angle: 68 Degree 2 x Dust Cover 1 x Eyepiece