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554 EUR
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price without VAT: 450 EUR
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 Shop online:
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Shop in Warsaw (qty):
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Astronomik H-alpha 6nm CCD 50 x 50mm², unmounted (SKU: 10212566 / 8h00ht) is a narrowband emission filter designed for imaging hydrogen nebulae. It records light emitted at the H-alpha 656 nm line and significantly increases contrast between the object and the sky background. The unmounted 50 x 50 mm² format makes it suitable for applications that require a filter without a cell.
With its 6 nm bandwidth, the filter effectively blocks unwanted light at other wavelengths, from UV to IR. It suppresses emission lines from sodium and mercury vapor lamps, natural airglow and a large portion of moonlight, making it suitable both for dark-sky imaging and for heavily light-polluted locations. When imaging faint objects in dense Milky Way star fields, the 6 nm version helps reduce the number of recorded stars and makes delicate nebular structures stand out more clearly.
The 6 nm version is especially recommended for imaging from extremely light-polluted sites and when using cameras with very low dark current. This filter must not be used for solar observation.
• narrowband H-alpha filter for imaging hydrogen nebulae
• transmission band centered on the H-alpha 656 nm line
• 6 nm bandwidth
• unmounted design in 50 x 50 mm² format
• significantly increases contrast between the object and the sky background
• blocks sodium and mercury emission lines, natural airglow and a large portion of moonlight
• suppresses unwanted light from UV to IR
• especially useful under strong light pollution and during full Moon imaging
• helps reveal faint objects in dense Milky Way star fields
• features Astronomik MFR coating for high contrast, minimal stray light and no halos
• Astronomik H-alpha 6nm CCD 50 x 50mm², unmounted
• durable filter storage box
• type: H-alpha narrowband filter
• format: 50 x 50 mm²
• design: unmounted
• central wavelength: 656 nm
• guaranteed transmission at the H-alpha line: over 90%
• typical transmission at the H-alpha line: 93%
• glass thickness: 1 mm
• material: finely polished optical glass, free of streaks, internal stress and bubbles
• coating: Astronomik MFR
• recommended focal ratio range: from f/4 to f/∞
• coating durability: highly scratch-resistant and resistant to humidity and aging effects
• optical characteristics: parfocal, diffraction-limited
This is a specialized emission-line imaging filter that helps reveal hydrogen nebula structure with strong contrast, making it an effective tool for astrophotography in demanding observing conditions.
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