ZWO 2" H-alpha 7nm Narrowband Filter pattern read noise will drop below

read noise will drop below 2e but same dynamic range (13 stops)

It’s the perfect solution for astrophotographers who want to minimize post-processing time and focus on producing high-quality images

Enjoy extremely high contrast

6nm filters are the best choice for observing sites with extremely strong light pollution

2e read noise

ZWO 2" H-alpha 7nm Narrowband Filter pattern read noise will drop belowZWO 2" H alpha 7nm Narrowband Filter The ZWO 2" H alpha 7nm Narrowband Filter is designed to dramatically improve deep sky image contrast and detail by isolating the 656 nm hydrogen alpha emission linethe dominant wavelength emitted by many nebulae. By aggressively rejecting unwanted wavelengths, this filter suppresses light pollution, moonlight, and sky glow, allowing faint nebulosity to stand out cleanly against a dark background. The result is