SVBONY telescope eyepiece 15mm, 68 degree ultra wide angle eyepiece provide you a extremely large field of vision perfect to observe the moon star clusters and the milky way. Internally blackened eyepiece barrel to avoid internal reflection and provide a crisp image. FMC(fully multied coating) film can reduce the reflection and refraction of light and enhance the transmission of light. 4 Lenses in 3 Groups:Multiple group lens combination to improve optical performance and deliver sharp image. SVBONY eyepiece 68° is suitable for any 1.25 inches telescope, diagonal mirror and telescope accessories. Standard 1.25 inches filter thread, can be used to connect moon filters, planetary filters and other telescope filters to obtain clearer and more contrasty images. 17mm Eye Relief: You can really put you eye up to the lens without your eyelashes getting in the way. If you are looking for a wider field of view of the night sky then this eyepiece is great for that. If you need moderate magnification for planetary objects and globular clusters, within its intended use of moderate magnification of non-dso objects, it does the job admirably. Relatively high-power 6mm focal length 66 wide-angle telescope eyepiece with myriad uses is a welcome addition to any astronomer's accessory case. Folding down and removable rubber eye guard for wearing glasses and comfortable viewing as well as blocking stray light to increase the brightness of image. 16mm long eye relief, provides comfortable long term viewing for people with or without glasses. Blackened aluminum fully threaded 1.25" eyepiece barrel and inside thread design to avoid internal reflection and provide a crisp image. Lens edges is blackened to reduce scattering of stray light and maximize contrast;designed to enhance the functionality and pleasure of using your telescope.