نطاق مرور H-alpha 3nm محسّن لـ f/2.8-f/3.6

Installed this in my imaging train last night and the difference in contrast on the Horsehead was immediate. The 3nm bandpass really blocks out the light pollution I've been fighting.

Pairing this with my f/3.0 scope finally brought out the Veil Nebula's faint tendrils that other filters couldn't resolve. The 3nm bandwidth is incredibly selective, cutting through urban skyglow without losing any of the critical H-alpha signal.

Used it on my EdgeHD 11 at f/7 and the contrast on the Veil Nebula was incredible, even with a full moon nearby. The 3nm bandpass cuts through light pollution better than my old 5nm filter ever did.