SV503 102mm F7 ED Refractor OTA Features a large 102mm aperture and F7 focal ratio for exceptional light-gathering capability, revealing bright, detailed views of celestial objects.Equipped with S-FPL51 ED glass and air-spaced doublet design to minimize chromatic aberration, ensuring crisp, true-color images of planets and deep-sky targets.Includes a dual-speed rack-and-pinion focuser (1:10 ratio) for smooth, precise adjustments, critical for both visual observation and astrophotography.SV215 3-8mm Zoom Eyepiece, a parfocal zoom eyepiece with a constant field of view, allowing seamless magnification changes without refocusing. Perfect for tracking planetary details or lunar craters.Click-stop design and multi-coated optics ensure sharp, contrast-rich views across its entire range. SV188P Dielectric Diagonal Mirror:Boasts 99% reflectivity with dielectric coatings for maximum light transmission and zero distortion.90° correct-image design provides comfortable terrestrial and astronomical viewing, while the brass compression ring securely holds eyepieces without scratching.SV182 30mm Finderscope, a 6x30mm wide-aperture finder with a crosshair reticle for easy target alignment.90° erect-image prism and multi-coated optics deliver a bright, right-side-up view, reducing neck strain during extended sessions.Universal Dovetail Base:Crafted from lightweight anodized aluminum, this base securely attaches to any telescope tube and supports multiple finderscopes or accessories.Compatible with major brands like Celestron, Orion, and Sky-Watcher for effortless integration.Planets & Moon: Resolve intricate details on Jupiter's cloud bands, Saturn's rings, and lunar craters with the ED optic's sharpness and the zoom eyepiece's flexibility.Deep-Sky Objects: The 102mm aperture excels in capturing faint galaxies, nebulae, and star clusters (e.g., Orion Nebula, Andromeda Galaxy).Terrestrial & Wide-Field Views: The diagonal mirror and finderscope provide comfortable, erect-image o