Astronomik OIII 6nm CCD 1,25 (M28,5) (SKU: 10215625 / 8h00n6) all astro filters opinie

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Astronomik OIII 6nm CCD Filter 1.25" (M28.5) (SKU: 10215625 / 8h00n6) is a narrowband emission filter designed for imaging nebulae that emit light in the oxygen [OIII] lines. It records radiation at wavelengths of 496 nm and 501 nm, significantly increasing contrast between the object and the sky background. The 1.25" (M28.5) filter format is intended for use in filter wheels, astronomical cameras and accessories supporting this standard.

The filter effectively blocks light pollution from sodium and mercury vapor lamps, natural airglow and a large portion of moonlight. This allows high-contrast nebula imaging both from heavily light-polluted locations and under dark skies.

The narrow 6 nm transmission band suppresses nearly all unwanted light at other wavelengths from ultraviolet to infrared. It is particularly useful for imaging faint objects in star-rich regions of the Milky Way and for observations from extremely light-polluted locations.

The OIII filter enables imaging of planetary nebulae, star-forming regions and supernova remnants. Combined with H-alpha and SII filters it enables emission-line imaging using the HSO palette.

Key features

• narrowband OIII filter for imaging emission nebulae
• transmission band covering the [OIII] lines at 496 nm and 501 nm
• 6 nm bandwidth
• standard 1.25" (M28.5) filter format
• effective suppression of light pollution
• very high contrast imaging of nebular structures
• blocking of unwanted light from UV to IR
• Astronomik MFR coating for high transmission and minimal stray light

Included items

• Astronomik OIII 6nm CCD Filter 1.25" (M28.5)
• durable protective filter box

Technical specifications

• type: OIII narrowband filter
• emission lines: 496 nm, 501 nm
• bandwidth (FWHM): 6 nm
• guaranteed transmission at OIII line (501 nm): over 88%
• typical transmission at OIII line: 92%
• mounting standard: 1.25" (M28.5)
• glass thickness: 1 mm
• material: finely polished optical glass free of streaks, internal stress and bubbles
• coating: Astronomik MFR
• focal ratio range: f/4–f/∞
• coating durability: highly resistant to scratches, humidity and aging
• optical characteristics: parfocal, diffraction-limited

The Astronomik OIII 6nm CCD filter allows astrophotographers to capture oxygen-emission nebula structures with extremely high contrast and fine detail even under challenging observing conditions.