Filtro SII 7nm da 36mm ZWO

• The narrowband nebula filter from ZWO clearly increses the contrast of the object. The filter reduces the effect of light pollution considerably
• ♦ Transmission more than 80% at 672 nm (S-II line)
• ♦ The filter has 36 mm diameter (round) and is not mounted
• ♦ FWHM 7 nm (narrow band)
• ♦ Main field of application: Photography of dim nebulae
• ♦ Homofokal mit allen ZWO Filtern

ZWO S-II Filter 7 nm - 36 mm unmounted
The narrowband nebula filter has a definite pass band around 672 nm. This is the line in which many planetary nebulae, emission nebulae and supernova remnants shine. Transmission in this range is 80%. The filter is the optimal choice for astrophotography. The contrast of nebulae is significantly increased.

Besides an L-RGB filter set, you can also get the H-Alpha and O-III filters from ZWO, with which false colour images and narrow band nebula images are possible. The filters are parfocal among each other.