Retractable solar film filter for telescopes: provides clear, safe solar viewing by blocking harmful UV and IR radiation, making it ideal for observing sunspots and for solar photography. Useful accessory for amateur astronomers: helps hobbyists and beginners confidently explore daytime celestial events and adds solar versatility to standard nighttime observing telescopes. Lightweight and easy-to-mount design: securely attaches to compatible telescope objectives without tools; enables quick installation and retraction for changing light conditions or portable setups. Ideal for daytime photography and observation: enhances contrast and reduces glare for detailed sun images or live viewing; suitable for scientific projects, classrooms, or backyard astronomy. Use cases and applications: - Daytime sun observations and solar photography at home, in schools, or science clubs. - Field and travel use with portable telescopes, enabling rapid switching between daytime solar viewing and nighttime astronomy. - Educational or research settings for classroom demonstrations, student projects, or backyard sun monitoring.