Daystar Filters ERF Glass: Advanced Energy Rejection for Optimal Solar Viewing

• Efficient Energy Rejection: Specifically designed to reduce the heat load on filter assemblies by absorbing or reflecting UV and/or IR light, while transmitting desired visual spectrum light.
• Versatile Filter Types: Includes options such as Red or Yellow glass, or dielectric IR and UV filters, all tailored to pass light in the visual spectrum.
• Dual Functionality: Serves as an Energy Rejection Filter (ERF) and an aperture mask to ensure a straight angle of incidence for light entering the filter, enhancing image quality.
• Optimal for Slower Configurations: DayStar filter assemblies perform best at f/30 and slower, making these ERFs ideal for such setups.
• Easy Integration with Barlows: Can be used in conjunction with barlows to create an f/30 configuration, suitable for higher resolution and larger aperture telescopes.
• Custom Aperture Calculation: Offers guidance on computing the proper aperture reduction mask by dividing the telescope's Effective Focal Length (EFL) by 30.
• Adaptability for Various Telescopes: Compatibility with a wide range of telescope models, with additional guidance available for specific reflectors or refractors.
• User-Friendly Configuration: Simple to calculate and implement the appropriate aperture using a barlow for adjusted EFL.
• Enhanced Solar Viewing: Ideal for astronomers focused on solar observation, providing a safer and more effective way to view and image the sun.
• Professional Grade Accessory: A crucial component for serious solar observers and astrophotographers seeking to optimize their solar viewing and imaging setups.