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SKU
ZWO-OIII7nmD31
ZWO O III 31mm Unmounted Narrowband Filter
Our Price $249.95
The ZWO O-III 7nm filter (D31) is specialised in observing the nebulae. These filters are ideal as they are more advanced compared to RGB imaging. This OIII filter will amplify your viewing experience as it eliminates any kind of pollution and will result in clear visuals.
This filter permits light at a wavelength of 500nm and 7nm bandwidth. This responds to the emission and blocks other unecessary light that may cause hindrance.
Specs
- FWHM：7±0.5nm
- Glass Thickness - 2.0+/-0.03 mm
- All surfaces are polished in order to achieve 1/4 wavefront
- Ensures 90% transmission of light at OIII line 500nm (OIII filter )
- Infrared wavelength - 700-1100nm cut-off
- <0.1% transmission of off-band, OD3(Optical Density)
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