Meade Series 4000 Oxygen-III Nebular Filters:
For the observation of diffuse emission and planetary nebulae.

Oxygen - III (OIII) Meade Nebular Filters provide an extraordinary level of nebular filtration on diffuse and planetary nebulae. Observations of these nebulae in a city environment with the O3 filter often yield more image contrast than observations of the same objects in a darksky setting without the filter.


O-III Nebular Meade Filter extracts more than 80% of the light emanating from the two oxygen-III spectral lines at 496 and 501nm. Objects such as the Omega (Swan) Nebula (M17) in Sagittarius, the Orion Nebula (M42) in Orion, the Helix Nebula (NGC 7293) in Aquarius, and the Eagle Nebula (M16) in Serpens are revealed in dramatically increased detail. Meade 60-layer interference coating technology isolates the desirable O-III lines, while attenuating other spectral lines virtually to zero.

  One model of Oxygen - III Nebular Meade Filters is available:
Meade Series 4000 Oxygen3 Nebular Filter #911X (item 07543):
Threads onto the rear cells of Meade LX-Series mirrorlens telescopes and onto Meade ED Apochromatic Refractors, using the Universal Thread Adapter.Also threads to other brands of SCT's as well.
# 911-X filter's Clear aperture: 36mm.

Features of Meade Series 4000 O-III Nebular Filters 908 X and 911 X:

• Extraordinary level of nebular filtration on diffuse and planetary nebulae
• Extracts more than 80% of the light emanating from the two oxygen-III spectral lines at 496 and 501nm
• Meade 60-layer interference coating technology isolates the desirable O-III lines

• Meade Series 4000 Oxygen- III Nebular Filter

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