The telescope uses an advanced BAK-4 optical prism and FMC (Full Multi-Coating) lens. The transmission of telescope lenses is increased, reducing unwanted light reflections, resulting in clear and sharp images.The 10-30x42 telescope features advanced full multilayer coating technology and a large BAK4 prism lens that increases light transmission and reduces unwanted light reflections while providing clear, Good-contrast, color-accurate images. Whether you wear glasses or not, this telescope can provide a beautiful view on your outdoor adventures without getting dizzy even after long viewings.10-30X magnification and wide field of view telescope provide a more comfortable, larger field of view, sharper details, and an unparalleled viewing experience. Perfect for hiking, camping, bird watching, sports, concerts, travel, scenic viewing.Our telescope features a Good-quality smartphone stand and a sturdy tripod that can be adjusted to two different angles and 3 lengths as needed. Professionally designed, easy to install, ensure clearer, brighter images without jitter.If you are not 100% satisfied with our products, please contact us and you will get the amazing service.