The ZWO 1.25-inch H alpha, Sii, Oiii, 7nm Filter Set will reduce the transmission of most wavelengths and only allow certain narrow bands to pass.
Technical Specifications of the ZWO 1.25-inch Filter Set
- FWHM: 7 plus or minus 0.5nm.
- Glass Thickness 1.9+/-0.03mm (1.25 inches/ 31mm/ 36mm).
- Fine-optically polished to ensure accurate 1/4 wavefront over both surfaces.
- About 90% transmission at H-alpha line 656nm (H-Alpha filter).
- About 90% transmission at Sii line 672nm (Sii filter).
- About 90% transmission at major Oiii line 500nm (Oiii filter).