ZWO 2" H-alpha 7nm Narrowband Filter pattern the 6nm filters will give

the 6nm filters will give you major advantages: Due to the stronger blocking of the background

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

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

Multi-layer coated optics

compatible with almost all 3

ZWO 2" H-alpha 7nm Narrowband Filter pattern the 6nm filters will giveZWO 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