1.25 Inch SVBONY SII Narrow Band 7nm Filter for CCDs, for Deep Space Astrophotography.
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1.25" SII Filter 7nm Narrow-Band for CCDs

SKU: W9122A
Regular price US$ 129.99

The SVBONY 1.25" SII Filters are made of glass import from Germany that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength or CWL.

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Model SV160
Size 1.25-inch
Type SII filter
Wavelength Range 300-1000nm 
CWL 672nm
FWHM 7nm
Surface Quality 60/40
Surface Parallelism 1/4λ
parallelism 30°
T peak 80%
Substrate B270
Substrate Thickness 1.85mm
Blocking OD3 @300-1000nm
Clear Aperture 26mm
Net Weight 5.5g/0.19oz

1. The Sulfur II 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). Like all SVBONY filters that are designated as “CCD”, this SII filter also blocks infrared wavelengths from 300nm to 1000nm so you don't need a separate IR-Cut filter

2. Thin metal cells have a clear aperture of 26mm for 1.25inch filters, each filter comes with a plastic case with high-pressure EVA case lining

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