Astronomik H-alpha Imaging Filter
Best high performance filter for urban astrophotographers capturing deep sky nebulae.
A specialized tool for deep-sky astrophotography that cuts through light pollution to reveal hidden nebular details. Its ultra-thin design and high transmission make it an essential upgrade for capturing crisp, high-contrast hydrogen-alpha data without compromising optical performance.
$209.95
at
Telescopes.net
Who it's for
- Astrophotographers shooting in urban environments with significant light pollution
- Efficiency-minded imagers using automated filter wheels for seamless transitions
- Long-term investors seeking durable equipment that maintains its resale value
Who should skip it
- Beginners using entry-level mounts that lack precise long-exposure tracking
- Casual photographers using unmodified color cameras without specialized sensors
- Budget-conscious hobbyists looking for more affordable entry-level filtering options
Performance breakdown
Light Transmission
Industry-leading throughput ensures maximum signal capture for faint deep-sky objects.
Contrast Enhancement
The 12nm bandpass aggressively isolates H-alpha light while suppressing urban glow.
Optical Integrity
Ultra-thin profile prevents vignetting and distortion on wide-angle lens setups.
Workflow Efficiency
Parfocal design saves significant time by eliminating constant refocusing between filters.
Build Durability
Robust coatings withstand the rigors of long, outdoor overnight imaging sessions.
System Compatibility
Clip-in form factor integrates seamlessly with Canon APS-C sensor bodies.
Key Specs
Filter Type
Narrowband H-alpha
Filter Shape
Clip-in
Filter Thickness
0.3 mm
Compatibility
Canon EOS APS-C
Light Transmission
96%
Bandpass
12nm
Water Repellent
Yes
Scratch Resistant
Yes
Warranty
10 Years
Material
Aluminium frame, Fine-optically polished glass
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