Cut right through the forest fire haze!
I was interested in how effective the Duo-Band filter would be for moonlight imaging. It works very well on H-alpha nebula, allowing much longer, deeper images. The filter improved deepness of OIII objects like M27, but coupled with the ASI2600MC Pro camera, the green side of the nebula's "teal" color is strongest. You can see a comparison image here: https://astronomybyrick.net/deepsky-imaging-in-moonlight . The Duo-Band is very useful at regaining imaging time on moonlit nights.
This filter is absolutely amazing. I’ve taken some of the best pictures that I’ve ever taken using the ZWO Duo Band filter. Imaging from Bortle class 6 skies with streetlights around you is near impossible. But with the ZWO Duo Band filter, the impossible becomes possible!