62 degree wide angle for maximum detail and definition across the entire field of view;gets a virtually distortion free image. Suitable for lunar observation holes;look more closely detailed at the moon's surface and other planet;perfect for viewing the planets, nebula, astronomical wonders, birdwatching, scenery,concerts. Standard 1.25" fitting diameter. Fits for any astronomical telescope with standard 1.25" focuser;perfect for broad field lunar observations. Both ends have dust caps for protecting the eyepieces.The lens covers are interchangeable and easy to use and keep in a pocket. The SVBONY super 1.25" 40 mm plossl eyepiece engineered with 4 element design and offers a generous 40 degree apparent field of view. It is awesome for perusing the sky and finding things like constellations, clusters, and galaxies in the field of view. The field of view of the highly achromatic lens is more realistic, allowing you to see more details. Lens edges are blackened to reduce scattering of stray light and maximize contrast. 40 degree apparent field of view eyepiece，makes acquiring and centering target objects a breeze. SVBONY Plossl eyepiece has M28.5x0.6 filters threads. Features a precision made standard 1.25" barrel for any 1.25'' astronomy telecope filters. The 1.25" eyepiece barrel can also be used with any 1.25" telescope, diagonal mirror, barlow lens, and other telescope accessories.