Baader Planetarium 140mm AstroSolar Telescope Filter #ASTF-140

Be captivated by the celestial wonders with the 140mm AstroSolar Telescope Filter, a high-quality product from the reputable Baader Planetarium. This innovative filter is designed to enhance your astronomical observation and imaging experience, providing a professional and secure solution for observing and imaging the Sun. The AstroSolar Telescope Filter is crafted with Baader AstroSolar Safety Film OD 5.0, a material renowned for its superior optical quality. Unlike many ready-made filters, this product does not stretch the filter material like a drumhead, which can compromise image quality. Instead, the AstroSolar film is mounted entirely stress-free, ensuring it performs like a high precision plane optical window.

This durable filter features a clear white IR-rejecting front ring with reinforcing raised edges, designed to protect the solar filter material from contact with any sharp metal edge. The user-friendly design includes no-tool mounting and adjustment of the centering bolts to fit a wide variety of mechanical tube diameters. The filter also comes with non-rotating sliding fasteners made from aluminum that hold the centering bolts. These metal sliders are equipped with a machined indicator to point towards the adjustment index. Additional Phillips screws are integrated into the sliding fasteners, allowing the centering bolts to be firmly fastened with a screwdriver if preferred by the user.

The AstroSolar Telescope Filter is designed with an index scale provided beside each adjustment slot, adjacent to each sliding fastener, for fast and repeatable adjustment of the filter cell onto different telescope tubes. Black sliding washers are supplied to securely cover the full length of the adjustment slots in the aluminum frame, blocking sunlight from passing through the filter cell beside the filter area. For added safety, the filter includes three security straps to secure the position of the filter cell with Velcro-adhesive pads. This ensures a secure fit in front of the telescope under any circumstances, such as a gust of wind.

The AstroSolar Telescope Filter is safe for solar observation and photography with all high-end telescopes and extreme tele-lenses, making it suitable for the highest magnifications and detailed observation of individual sunspots. With its temperature compensated cell, the AstroSolar filter material retains its excellent optical quality at any temperature, be it -30Deg C or +50Deg C. In conclusion, the 140mm AstroSolar Telescope Filter from Baader Planetarium is an efficient and user-friendly tool for all your astronomical observation and imaging needs. It's not just a filter, it's a gateway to the cosmos.