INCLUDED - Vaonis Dual Band Filter for Vespera Telescope, Bundle with Light Pollution Filter. ENHANCED OPTICAL QUALITY - Experience superior viewing with a 78mm filter size, meticulously crafted from high-quality glass for pristine astronomical observations. OPTIMAL LIGHT TRANSMISSION - The dual-band filter, including Oxygen III and H-Alpha (Night Sky) types, significantly reduces light pollution for clearer celestial images. SEAMLESS COMPATIBILITY - Specifically designed for the Vespera Telescope, ensuring a perfect fit and effortless integration for immediate use.