ZWO 7nm OIII Filters

Brand: ZWO
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ZWO 7nm OIII Filters

Brand: ZWO
$189.00$289.00 AUD
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ZWO 7nm OIII Filters

The ZWO 7nm OIII filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulas in a totally new light, no matter how polluted your skies may be!

  • Hubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula)
  • Narrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks

1.25 inch suits the new ZWO 8 position 1.25 inch Filterwheel

31mm unmounted suits the new ZWO 8 position 31mm Filterwheel

36mm unmounted suits the new  ZWO 7 position 36mm Filterwheel

 

New from ZWO Narrow band filters.

The ZWO 7nm OIII filter is centered around the Oxygen III band of 501nm. Oxygen III or double ionised oxygen occurs at  primarily at 500.7nm and secondarily 495.9nm.  The highest levels of OIII are usually found in diffuse and planetary nebulae. The OIII emission lines were first discovered in the 1860s in spectra of planetary nebulae.  OIII wavelengths relate to the green-turquoise-cyan in colour on the spectrum whilst the narrowband width makes the background space very black.

When used in conjunction with the narrowband H-alpha and narrowband SII filters they make up part of the Hubble Palette, used by HST to faint gases in nebulae.

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