ZWO Duo-Band Filter (2")

ZWO Duo-Band Filter DB2 - 2"

Bring out the finest details of emission nebulae with the ZWO Duo-Band Filter DB2, a high-performance dual narrowband filter designed to transform your deep-sky astrophotography. Engineered to transmit only the key wavelengths of H-Alpha (656 nm) and OIII (500 nm), it enhances contrast and clarity while reducing the effects of light pollution — even under urban skies.

Exceptional Optical Precision

With over 90% transmission at the main OIII lines (486 nm, 496 nm and 501 nm) and over 80% at H-Alpha (656.3 nm), the DB2 ensures maximum light throughput where it matters most. The result: vibrant, high-contrast images with rich detail in nebulae and other emission regions. Each filter is fine-optically polished to achieve a 1/4 wavefront accuracy and <30 arcsecond parallelism, guaranteeing sharp and distortion-free performance.

Built for Durability and Performance

Crafted from high-quality aerometal using CNC precision machining, the DB2 features a fine sandblasted anodized finish that’s both stylish and protective. A special extinction treatment prevents unwanted internal reflections, while laser-engraved markings ensure lasting readability. Designed to work seamlessly with ZWO ASI cameras and EFW electronic filter wheels, it integrates effortlessly into your imaging setup.

Perfect for One-Shot Color (OSC) cameras, the Duo-Band DB2 provides a simple and economical way to explore narrowband imaging — no monochrome setup or multiple filters required. Whether you’re imaging from a dark-sky site or a city balcony, the DB2 helps reveal the hidden beauty of the deep sky with remarkable contrast and color balance.

Elevate your astrophotography with the ZWO Duo-Band Filter DB2 and capture the universe like never before. Whether you’re a seasoned astrophotographer or just starting out, this filter will help you achieve stunning, high-contrast images with ease.