ZWO Duo-Band Dual-Bandpass Narrowband Imaging Filter - 1.25" refractor telescope diagonal Solar Observation: Includes a full-aperture

Solar Observation: Includes a full-aperture solar filter for safe viewing of sunspots

Cross-boundary alarm reminder interval setting (1-9 minutes)

Thanks to the Self Centering Clamp (SCC) technology

Waterproof

regardless of distance

ZWO Duo-Band Dual-Bandpass Narrowband Imaging Filter - 1.25" refractor telescope diagonal Solar Observation: Includes a full-apertureThe ZWO Duo Band Filter is a dual narrowband imaging filter designed for one shot colour (OSC) astronomy cameras. By isolating the important H alpha (656. 3nm) and OIII (500nm) emission lines, it enhances contrast in nebulae while reducing the effects of moonlight and urban light pollution. Ideal for deep sky astrophotography, the Duo Band filter allows colour camera users to capture narrowband style images without the need for a monochrome camera,