- SVBONY 2 inch OIII-CCD 7nm Narrow-Band Filter for Deep Sky 2" Mounted; can enhances the contrast between the target and the sky; allowing you to capture high-quality images even under the urban sky; Suitable for lightly polluted urban areas and relatively dim launch nebulae
- 7nm Extra Narrowband Filter;The Oxygen III 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 500nm and drastically reduces other transmissions; including wavelengths of light that are responsible for light pollution
- High-quality materials; The SVBONY 2" Filters are made 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
- High-level manufacturing process;The filter cell is made of lightweight; strong metal and is CNC machined; sand-blasted; black anodized; and then laser engraved; The result is a super thin filter cell that will produce a clear aperture of 45mm
- Powerful functionality; Like all SVBONY filters that are designated as "CCD"; this OIII also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter; make your use more convenient
A true OIII Filter that works awesome!
The SVBONY 2" Filters are made 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. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted; black anodized, and then laser engraved. The result is a super thin filter cell that will produce a clear aperture of 45mm.
The Oxygen III 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 500nm 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 OIII also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter.
Thickness : 1.85mm
Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
Surface quality, according to MIL-O-13830, is 60/40
80% transmission at OIII line 500nm
Infrared wavelength 700-1100nm cut-off
0.1% transmission Hg at 435nm and 578nm
0.1% transmission Na at 589nm
Thin metal cells have a clear aperture of 45mm for 2 inch filters
Each filter comes with a plastic case with high pressure EVA case lining
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