The ZWO narrowband O-III 7nm filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm
- FWHM:7±0.5nm
- Fine-optically polished to ensure accurate 1/4 wavefront over the both surfaces
- About 90% transmission at major OIII line 500nm
- Infrared wavelength 700-1100nm cut-off
- <0.1% transmission of off-band, OD3(Optical Density)
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