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)

6nm filters offer significant advantages

Glass thickness: 1mm

1mm (for Pocket Powerbox and any other Pegasus Products)

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

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