ZWO H-alpha 7nm Filter - 2" Mounted
ZWO
ZWO H-alpha 7nm 2-inch Filter is a H-alpha narrowband filter in 2" for mono emission-line imaging.
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Specifications
Filter
- Filter type
- H-alpha narrowband filter
- Filter size
- 2"
- Glass thickness
- 1.85 mm
- Transmission
- 80%
Spectral
- Passbands
- H-alpha 656.3 nm (7 nm)
- Band count
- 1 band
- Narrowest bandpass
- 7 nm
- Blocking
- Blocks common artificial light and airglow outside the target emission line
Construction
- Substrate / coating
- Optical glass; Multi-layer anti-reflection coating
Use
- Camera use
- Mono astronomy cameras
- Best for
- Emission nebulae
Astrophotography Fit
Best for isolating emission lines with a mono camera and filter wheel.
ZWO H-alpha 7nm 2-inch Filter is a midrange H-alpha narrowband filter (2"). Passbands: H-alpha 656.3 nm (7 nm).
Best for isolating emission lines with a mono camera and filter wheel.
Choose filter size around the sensor diagonal, telescope speed, and filter-wheel or drawer geometry. Flats are still required; a filter can improve contrast, but it will not rescue tilt, bad focus, or poor calibration.
Best paired with
- Monochrome camera, matching filter wheel, and autofocus offsets
- Ha/OIII/SII emission nebula projects
- Long integrations with darks, flats, and careful star handling
Not recommended for
- Unmodified color cameras as the primary workflow
- Targets dominated by broadband continuum signal
- Users who want natural star color with minimal processing
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| ZWO USA ZWO USA | $299.00 | In stock Updated 5/15/2026 | View Offer - $299.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.