ZWO Duo-Band filter 1.25 inch: photographing nebulae despite light pollution
Do you want to photograph emission nebulae with your color camera, but is light pollution getting in the way? This dual-band filter transmits only the two most important emission lines: H-alpha from hydrogen (656 nm) and OIII from oxygen (around 500 nm). Stray light from street lighting and moonlight is blocked, allowing nebulae to land on your sensor with much higher contrast.
The filter is tailored to ZWO ASI color cameras such as the ASI533MC and ASI2600MC and works without complex setup: just mount the filter and start shooting. This makes it one of the most popular upgrades for both beginners and advanced users of a color camera.
What you photograph with it
- Emission nebulae like the Orion Nebula and the Veil Nebula
- Planetary nebulae with rich details
- Supernova remnants
- Deep-sky objects from a light-polluted area
Compatibility
Fits all 1.25 inch focusers, filter holders and filter wheels. Intended for color cameras (ZWO ASI MC series); visual use is possible, but the filter is primarily designed for photography. Are you looking for the larger size for full-frame setups or the Seestar S50? Choose the Duo-Band 2 inch.
Specifications
| Filter type | dual-band narrowband filter (UHC-type) |
| Format | 1.25 inches (31.7 mm) |
| Doorlating OIII | greater than 90% at 486 to 501 nm, bandwidth 35 nm |
| H-alpha throughput | greater than 80% at 656.3 nm, bandwidth 15 nm |
| Mount | aluminum |
| Use | photographic, visually possible |
A filter from the filter series of ZWOThe simplest step towards contrasting selfie photos with a color camera.
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