Baader ASTF Astro Solar Filter for telescopes for safe solar observation - aperture 240 mm - clamping range 260 mm to 300 mm. Baader high-end solar filters enable safe observation and photography of the sun with telescopes and telephoto lenses. Reliable and safe filtering of sunlight with the Baader AstroSolar Safety Film (OD 5.0) - the film is coated on both sides. Stress-free and securely mounted in a high-quality temperature-compensating housing. Suitable for high magnifications and detailed observations of the sun and sunspots. The sun is depicted in natural whitish light - no color tinting. Flexible mounting through three adjustable centering pins with rubber coating.