1. Safe Solar Observation: Designed for safe viewing of the sun, this solar filter blocks harmful rays and intense brightness, allowing clear observation of sunspots and solar activity without risking eye or equipment damage.<br> 2. Retractable Design for Convenience: Built with a retractable structure for easy application and removal, this filter enables quick setup for daytime use and compact storage when not in use—ideal for portable telescopes and fieldwork.<br> 3. Telescope Compatibility: Fits a wide range of telescope sizes with an adjustable or snug frame design, offering reliable performance for beginners and experienced astronomers using refractor, reflector, or catadioptric models.<br> 4. Definition Solar Imaging: Enables solar viewing and photography by reducing glare and enhancing contrast, making it a useful tool for astrophotographers capturing solar flares, eclipses, or daily sun movement.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store