مرشح ZWO Hα 7 نانومتر - 36 مم - Ha7nmD36

First clear night with this filter and the contrast on the Orion nebula was noticeably sharper than with my old broadband filter. The narrow 7nm bandpass really cut through the urban skyglow.

The 1/4 wave polish is evident the moment you attach it—star halos on bright nebulae just disappear, leaving crisp detail. Threads sit perfectly in the filter wheel with zero tilt, and the 7nm bandpass really cuts through moonlit skies.

Switching from my old broadband filter to this 7nm narrowband made a huge difference in capturing the Horsehead Nebula—the contrast on hydrogen-alpha detail is stunning. I love how sharp the stars look, even at f/7.