ZWO 7nm SII Narrowband Filters
The ZWO 7nm SII filter passes light at 672.4nm (Ionised Sulphur) wavelength with a bandpass of 7nm which is designed for nebula observation. Deep in the red part of the spectrum, it is common in deep sky objects. The SII filter detects faint feathery detail in nebulae that’s not seen in H-alpha. It is suitable for imaging on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor (Hubble Pallet) CCD astrophotography.
- Hubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)
- Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks
1.25 inch suits the new ZWO 8 position 1.25 inch Filterwheel
31mm unmounted suits the new ZWO 8 position 31mm Filterwheel
36mm unmounted suits the new ZWO 7 position 36mm Filterwheel