Chroma SII Narrowband Filter
Best narrowband filter for serious astrophotographers using fast telescopes.
This high-precision optical component is designed to isolate specific light wavelengths, significantly enhancing contrast in deep-sky imaging. Its parfocal design ensures focus consistency, making it a reliable choice for demanding astrophotography setups.
$1200.00
at
Astroshop
Who it's for
- Astrophotographers shooting from light-polluted urban environments
- Users of fast focal ratio telescopes needing consistent performance
- Advanced imagers creating professional-grade Hubble Palette compositions
Who should skip it
- Budget-conscious hobbyists seeking entry-level equipment
- Imagers with limited time for long-exposure data collection
- Beginners struggling with precise optical train alignment
Performance breakdown
Bandwidth Precision
Ultra-narrow 3nm passband isolates sulfur emission lines with surgical accuracy.
Contrast Enhancement
Drastically darkens background skies to make faint nebulae pop vividly.
Optical Transmission
High-efficiency coatings ensure maximum signal capture for shorter exposure times.
Build Quality
Rugged, American-made construction withstands years of rigorous field use.
Fast Optics Compatibility
Engineered specifically to minimize haloing on high-speed telescope systems.
Surface Uniformity
Consistent coating thickness prevents artifacts across the entire image frame.
Key Specs
Bandpass
3nm
Filter Thickness
3mm
Filter Type
SII
Shape
Round
Size
31mm
Transmitted Wavefront
Better than 0.25 waves/inch
Parallelism
Less than 30 arcsec
Country of Origin
U.S.A.
Connection
2 inches
Central Wavelength
672.4 nm
Still have a question?
Ask Metto anything about the Chroma SII Narrowband Filter before you decide.
