Anti-slip rubber grip ring; grip on the rubber ring protrusion; enhance friction; effectively prevent the eyepiece from falling off Plossl eyepieces provide sharp views with reasonably controlled aberrations in telescopes with focal ratios down to f/4 or so Product description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. SVBONY 25mm Telescope Eyepiece Instruction Manual Svbony Camera SVBONY SV131 Plossl Eyepiece, 1.25 Inches 25mm Telescope Lens, 4 Elements Design 48 Degrees Field Of View Telescope Eyepiece With Filter Threaded Svbony Telescope Comes with plastic case; sturdy plastic housing protects eyepieces from dust and moisture SVBONY 25mm Telescope Eyepiece, Large Aperture Eyepiece, 40 Degree Field of View Plossl Eyepiece with Filter Threaded for Observing Moon Planetary Binary : : Electronics No Additional Cost: You pay $0 for repairs -- parts, labor, and shipping included. Coverage 25mm focal length eyepiece; provides moderate magnification; for observation of lunar planetary binaries FMC lens; full multi-layer coating; reducing light loss; FMC telescope eyepiece allows you to image clearer and brighter in low-light conditions
