- Type: High-quality composite membrane filter designed specifically for astronomical telescopes, enhancing your stargazing experience. - Frame Material: Durable aluminum metal construction ensures long-lasting performance and stability during use. - Film Material: Premium PET film with an aluminum foil coating maximizes light transmission while effectively blocking harmful rays, providing clear and crisp images. - Fixed Diameter: Compatible with telescopes featuring a fixed diameter ranging from 184mm to 210mm, making it a versatile choice for various telescope models. Key Benefits: - Enhances image clarity by filtering out unwanted light, allowing for better observation of celestial objects. - Protects your eyes from harmful solar radiation during solar observations, ensuring safe viewing. - Easy to install and remove, making it convenient for both amateur and professional astronomers. Use Scenarios: 1. Perfect for solar observation, this filter allows you to safely view solar events such as eclipses and sunspots. 2. Ideal for deep sky observation, it enhances the visibility of faint objects like nebulae and galaxies, making your stargazing sessions more rewarding. 3. A must-have accessory for astrophotography, it helps you capture detailed images of celestial bodies without the interference of excessive light. Experience the difference in your astronomical observations with this reliable composite membrane filter, designed for performance and safety.