Baader AstroSolar ASTF Filter
Best solar filter for owners of large-aperture telescopes.
This filter turns your existing telescope into a dedicated solar observatory without requiring a separate, expensive instrument. While it demands careful handling to ensure a secure fit, the payoff is a crisp, high-contrast view of the sun that standard makeshift filters simply cannot match.
$147.00
Who it's for
- Solar observers seeking sharp, high-contrast views of the sun
- Safety-conscious astronomers needing a secure, durable filter mount
- Telescope owners with multiple large-aperture instruments
Who should skip it
- Budget-focused hobbyists preferring DIY or lower-cost alternatives
- Careless users prone to damaging delicate optical equipment
- Purists wanting full-aperture light gathering for their largest scopes
Performance breakdown
Safety Standards
Industry-leading filtration technology ensures complete protection during direct solar viewing.
Optical Clarity
Delivers crisp, high-contrast views of sunspots and solar granulation.
Fit Precision
Adjustable mounting system creates a secure, wobble-free seal on large apertures.
Build Durability
Rugged construction withstands frequent handling in outdoor field conditions.
Ease of Setup
Intuitive design allows for quick, stress-free attachment to your telescope.
Versatility
Compatible with a wide range of telescope optical designs and brands.
Key Specs
Filter Diameter
240 mm
Compatibility
Telescopes with 260-300 mm Outer Diameter
Solar Safe
Yes
Filter Type
Solar
Accessory Type
Filter
Telescope Compatibility
Refractor, Reflector, Schmidt-Cassegrain, Maksutov-Cassegrain, Dobsonian
Know before you buy
Still have a question?
Ask Metto anything about the Baader AstroSolar ASTF Filter before you decide.
