ZWO Filter Set H-alpha, SII, and OIII 1.25 inch: narrowband imaging with maximum nebula detail
This narrowband filter set is your gateway to serious narrowband astrophotography with a monochrome camera. Each filter isolates a specific emission line with a bandwidth of just 7 nm, making faint nebula structures visible with high contrast and virtually eliminating light pollution. This allows you to capture detailed nebulae, even in the middle of the city or under moonlight.
What each filter does
- H-alpha (656 nm): hydrogen nebulae and HII regions, the richest signal in the night sky
- OIII (501 nm): Planetary Nebulae and Supernova Remnants
- SII (672 nm): Z-wave emission in deep nebulae
Samen vormen de drie kanalen het klassieke Hubble-palet (SHO), de kleurcombinatie waarmee de bekendste nevelfoto’s zijn gemaakt. Elk kanaal belicht je apart en combineer je daarna in bewerkingssoftware tot een kleurenbeeld.
Compatibility
De filters passen in alle filterwielen met 1,25 inch sleuven, zoals de ZWO EFW 8×1,25 inch. Ze zijn homofocaal met de ZWO LRGB-filters, dus wisselen kan zonder opnieuw scherp te stellen. Optimaal in combinatie met monochrome camera’s zoals de ASI183MM of ASI294MM Mono.
Specifications
| Filter type | small band filter set (H-alpha, SII, OIII) |
| Format | 1.25 inches (31.7 mm) |
| Half-value width | 7 nm per filter |
| Transmission | more than 80% |
| Housing | aluminum |
| Use | photographic, with a single camera |
The complete narrowband set from the filter series ZWO. Combine with a ZWO EFW filter wheel and a mono camera for a fully automatic SHO workflow.
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