Wide Viewing Experience: Enhance your astronomical adventures with a 58-degree wide field of view that brings planetary and deep-sky observations to life with clarity and detail.;Fully Multi-Coated Optics: Designed with green-coated lenses that maximize light transmission and reduce reflections for sharper, brighter images during bright celestial observations.;Precision 4mm Focal Length: Ideal for high magnifications, this eyepiece allows you to explore the moon's surface and other planets up close with enhanced definition.;Universal Compatibility: With a standard 1.25-inch barrel, it seamlessly fits any astronomical telescope equipped with a 1.25 \" focuser for versatile use.;Ergonomic Fold-Down Eyecup: Includes a foldable rubber eyecup that blocks stray light, ensuring comfortable viewing while virtually eliminating lateral chromatic aberration and light scatter.;Designed for both amateur and experienced astronomers, this telescope eyepiece elevates your observing experience by combining precision engineering with user-centric design. The 4mm focal length provides powerful magnification, perfect for planetary exploration or observing deep-sky objects. Its fully multi-coated green lenses enhance contrast and clarity, offering vivid views of celestial phenomena. Whether you're viewing bright celestial bodies or exploring nebulae, this accessory ensures optimal performance. Built with a durable black finish and a standard 1.25-inch barrel, it is compatible with most telescopes, making it an essential addition to your astronomical toolkit. r nOur customer service team consists of experienced, professional, and responsible staff. They will do their utmost to solve your problems and convey our sincerity and commitment. By choosing our products, you choose security and peace of mind.