ZWO 2-inch narrowband filter set: full-frame narrowband photography
This set of three 2-inch narrowband filters isolates the emission lines of hydrogen (H-alpha, 656 nm), sulfur (SII, 672 nm), and oxygen (OIII, 500 nm) with a bandwidth of 7 nm. Light pollution is almost completely suppressed, allowing faint HII regions, planetary nebulae, and supernova remnants to be captured on the sensor with exceptional contrast, even under urban skies.
The 2-inch format makes the set suitable for the largest sensors, up to full-frame cameras such as the ASI6200MM Pro. The filters are parfocal with all ZWO filters, so switching between LRGB and narrowband can be done without refocusing. The set comes in a sturdy storage case.
Features
- Three narrow-band filters with 7 nm full width at half maximum
- 2-inch format: no vignetting up to full-frame
- Parfocal with all LRGB/narrowband filters: no refocusing
- Delivered in a sturdy storage box for safe transport
Compatibility
Fits in 2-inch filter wheels, filter drawers and low-profile filter holders. Designed for monochrome ZWO ASI cameras; combine with the 2-inch LRGB set for a complete workflow.
Specifications
| Format | 2 inches (50.8 mm) |
| Filters | H-alpha 656 nm, SII 672 nm, OIII 500 nm |
| Half-value width | 7 nm |
| Transmission | 80% |
| Coating | multilayer interference coating |
| Housing | aluminum |
| Use | photographic, with a single camera |
The top segment of the filter series of ZWO for anyone shooting large-format narrowband photography.










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