Astronomik OIII Imaging Filter
Best high contrast filter for dedicated deep sky astrophotographers.
This narrowband filter isolates the 501nm oxygen spectral line, making it an essential tool for capturing planetary nebulae. Its precise 12nm bandpass effectively cuts through light pollution, ensuring crisp, high-contrast images even in less-than-ideal conditions.
$189.95
at
Woodland Hills Camera
More OIII options
Who it's for
- Astrophotographers seeking high-definition details in faint deep-sky objects
- Dedicated imagers looking for long-lasting, professional-grade optical components
- Efficient astrophotographers wanting to streamline their imaging workflow
Who should skip it
- Budget-conscious hobbyists looking for more affordable entry-level equipment
- Perfectionists using fast telescopes with extremely bright target stars
- Generalist observers wanting a single filter for all celestial targets
Performance breakdown
Spectral Precision
The 12nm bandpass effectively isolates OIII light with surgical accuracy.
Light Transmission
Industry-leading transmission ensures maximum signal capture for faint nebulae.
Light Pollution Rejection
Significantly cuts through urban glow to reveal hidden deep-sky details.
Workflow Integration
Parfocal design saves precious time by eliminating constant refocusing.
Build Durability
Robust moisture and scratch-resistant coatings protect against harsh field conditions.
System Compatibility
Seamless clip-in design perfectly suits Canon APS-C sensor bodies.
Key Specs
Filter Type
OIII Clip-in
Bandpass
12nm
Transmission
96% at 501nm
Compatibility
Canon EOS APS-C
Thickness
1mm
Warranty
10 Years
Water Resistant
Yes
Optics Compatibility
Up to f/3 focal ratio
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