Top Pick
Top Pick
Who it's for
- Exceptional Transmission Efficiency
- Superior Light Pollution Rejection
- High Durability and Coating Consistency
Who should skip it
- Premium Price Point
- Requires Specialized Imaging Setup
- Potential for Star Halos
Key Specs
Filter Type
SII
Bandwidth
8nm
Size
31mm
Filter Shape
Round
Parfocal for systems f/4.0 or slower
Transmitted wavefront better than 0.25 waves/inch
Parallelism
less than 30 arcsec
Material
Glass
Connection Interface
1.25 inch, 2 inch
Accessory Type
Filter
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Ask Metto anything about the Chroma SII Narrowband Filter before you decide.
