Set HA, S-II, O-III da 36mm

• The narrowband nebula filters from ZWO clearly increse the contrast of the object
• ♦ The set consists of an H-Alpha (656 nm), S-II (672 nm) and O-III (500 nm) filter
• ♦ The filters have 36 mm diameter (round) and are not mounted
• ♦ FWHM 7 nm (narrow band)
• ♦ Main field of application: Photography of dim nebulae
• ♦ Parfocal with all ZWO filters

ZWO H-Alpha Filter 7 nm - 36 mm unmounted
The narrowband nebula filter has a definite pass band around 656 nm. This is the line in which H-II objects (hydrogen nebulae) shine. Transmission in this range is 80%. The filter is the optimal choice for astrophotography. The contrast of nebulae is significantly increased.

ZWO O-III Filter 7 nm - 36 mm unmounted
The narrowband nebula filter has a definite pass band around 500 nm. This is the line in which many planetary nebulae shine. Transmission in this range is 80%. The filter is the optimal choice for astrophotography. The contrast of nebulae is significantly increased. The filter is also suitable for visual observation.

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.

There is also an L-RGB filter set available from ZWO. The filters are parfocal among each other.