The ZWO Sulphur 2 (S-II) filter lets the light of the ionized sulfur pass and blocks the rest of the visual spectrum in which a CCD camera is sensitive.
Sulfur is not abundant in the universe, however, near high-energy regions and objects such as supernova shock fronts and hot massive stars. We typically see this Sulphur near areas where high-speed gases are colliding in gaseous remains of exploded stars — called supernova remnants, which tend to have relatively strong sulfur emission.
Key features:
Original price was: $269.00.$239.00Current price is: $239.00. inc GST
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The ZWO narrowband S-II 7nm filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants.
Use it with H-alpha and OIII narrowband filters Set for tricolor CCD astrophotography.
Narrowband imaging with the full set (H-alpha, OIII-CCD and SII-CCD) of filters can be done with the moon visible and in heavy light pollution, so your equipment is not sitting dormant for several weeks
| Size: | 36 mm |
| Shape: | Round (unmounted) |
| Thickness: | 2.0 mm |
| Package: | Plastic case |
| Transmission at 672nm (S2) | 90% |
| Infrared wavelength: | 700 – 1100nm cut off |
| FWHM: | 7±0.5nm |
| In the box: | 36mm Sulphur 2 Filter |
