1[25in Interface] 3X eyepiece lens can be used with astronomical telescope with 25in for large field lunar observation, medium sized star cluster, and a wide range of cloudy nebulae and deep space target. 2[FMC Green Film] Fully coated green coated optical glass eyepieces with excellent image contrast and light transmission for maximum detail and clarity across the entire field of view. Planetary filter enhances details. 3[3X and Anti Slip] Magnification lens has 3X magnification, making it ideal for enthusiasts with fast, short focal length telescopes. Anti slip and anti jamming design with inward slope to help avoid accidental falls. 4[Photographic Thread] Telescope eyepiece 25 inch eyepiece tube with thread, supports connection to interface adapter with T2 (M42x0.75mm) thread and M35x1mm thread. 5[Material and Photography Extension] Telescope eyepiece uses aluminum alloy lens body and optical glass lens. Photography Extension: 22mm / 0.87in with M35 mount, 31mm / 22in with M42 mount.1 x Magnification Lens