Baader Planetarium AstroSolar ASTF Filter
Best high precision solar filter for dedicated astronomical observers.
This precision-engineered solar filter ensures safe, high-contrast views of the sun across a wide range of temperatures. Its temperature-compensated design prevents astigmatism and stress, making it a reliable choice for both visual observation and solar photography.
$140.00
at
Astro-physics
More AstroSolar options
Who it's for
- Solar observers seeking professional-grade image sharpness and detail
- Dedicated astronomers observing in varying outdoor temperatures
- Owners of multiple telescopes looking for a versatile mounting solution
Who should skip it
- Users who prioritize rugged, solid glass filters for heavy field use
- Budget-conscious hobbyists looking for the most affordable solar entry point
- Visual observers who prefer a warm, stylized solar appearance
Performance breakdown
Optical Clarity
Stress-free mounting ensures razor-sharp views of sunspots and solar granulation.
Safety Reliability
Industry-standard OD 5.0 rating provides absolute confidence for direct solar viewing.
Build Durability
Temperature-compensated cell maintains structural integrity across extreme environmental conditions.
Mounting Versatility
Adjustable centering bolts accommodate a wide range of telescope tube diameters.
Ease of Setup
Tool-free design allows for quick, secure attachment without complex adjustments.
Material Protection
Reinforced edges effectively shield the delicate filter film from accidental tears.
Key Specs
Filter Diameter
180mm
Filter Type
Solar
Optical Density
5.0
Fits Tube Outer Diameter
200-240mm
Material
Aluminum and fiber reinforced plastic
Operating Temperature Range
-30C to +50C
Astrophotography Ready
Yes
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