Want to photograph emission nebulae and deep-sky objects with your color camera, but struggling with light pollution? Then the ZWO Duo-Band 1.25″ is the ideal upgrade. This dual narrowband filter is designed for astrophotography with ZWO ASI Color cameras, such as the ASI533MC or ASI2600MC, and enables capturing Hα and OIII light without complex setup.
What does the filter do exactly?
- Only allows specific wavelengths of hydrogen (Hα at 656 nm) and oxygen (OIII at 500 nm) to pass through
- Blocks stray light from street lighting and moonlight
- Improves contrast and detail of nebulae, supernova remnants and planetary nebulae
Thanks to the combination of simplicity, effectiveness and price, this is one of the most popular upgrades for both beginners and advanced users with a color camera.
What You Can See / Photograph with It
✓ Emission nebulae (such as the Veil Nebula or Orion Nebula)
✓ Planetary nebulae with rich details
✓ Supernova remnants
✓ Deep-sky objects in light-polluted environments
✓ Improved contrast when photographing with ASI Color cameras
Specifications
| Property | Value |
|---|---|
| Filter type | Duo-band narrowband filter |
| Fitting size | 1.25″ (31.7 mm) |
| Mount material | Aluminum |
| OIII transmission | >90% at 486, 496, 501 nm |
| Hα transmission | >80% at 656.3 nm |
| Bandwidth | OIII: 35 nm, Hα: 15 nm |
| Visual use | Possible, but primarily intended for photography |
| Compatible with | All 1.25″ focusers and color cameras (ZWO ASI MC series) |
| Application | Light pollution suppression, contrast enhancement, deep-sky imaging |
| Design | UHC-type duo filter |
Reviews
There are no reviews yet.