Astronomik OIII Imaging Filter
Best specialized filter for serious deep sky astrophotography.
A precise narrowband tool designed to isolate the Sulfur II spectral line for deep-sky imaging. It effectively cuts through light pollution to reveal hidden nebular details while maintaining parfocal consistency with other filters in the lineup.
$189.95
Who it's for
- Astrophotographers targeting specific emission nebulae and galactic remnants.
- Urban astrophotographers seeking to overcome significant light pollution challenges.
- Imagers prioritizing signal strength and shorter total integration times.
Who should skip it
- Beginners expecting a single filter solution for vibrant, full-color astrophotography.
- Hobbyists seeking a versatile, all-around filter for various celestial objects.
- Advanced imagers demanding the absolute highest contrast and background suppression.
Performance breakdown
Spectral Isolation
The 12nm bandpass delivers exceptional contrast for OIII-rich nebulae.
Light Transmission
Near-perfect throughput ensures maximum signal capture during long exposures.
Light Pollution Rejection
Effectively cuts through urban skyglow to reveal hidden deep-sky details.
System Integration
Parfocal design saves significant time by eliminating constant refocusing.
Durability
Resistant to moisture and scratches, built for long-term field reliability.
Optical Versatility
Maintains high performance even with fast f/3 optical systems.
Key Specs
50mm filter size
12nm bandpass
96% light transmission
1mm thickness
10-year warranty
Water resistant
Protective case included
Compatible with optics up to f/3
Know before you buy
Still have a question?
Ask Metto anything about the Astronomik OIII Imaging Filter before you decide.
