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547 EUR
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price without VAT: 445 EUR
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Astronomik H-alpha 6nm CCD 50 mm Filter (SKU: 10212565 / 8h00f7) 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 50 mm filter format is intended for use in filter wheels and astrophotography systems that support this diameter.
With its 6 nm bandwidth, the filter effectively blocks unwanted light at other wavelengths from ultraviolet to infrared. It suppresses emission lines from sodium and mercury vapor lamps, natural airglow and a large portion of moonlight, allowing high-contrast imaging both under dark skies and in 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 faint nebular structures more visible.
The 6 nm version is particularly 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
• 50 mm filter format for use in filter wheels
• 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 nebular structures in dense Milky Way star fields
• Astronomik MFR coating ensures high contrast and minimal stray light
• Astronomik H-alpha 6nm CCD 50 mm filter
• durable filter storage box
• type: H-alpha narrowband filter
• diameter: 50 mm
• central wavelength: 656 nm
• bandwidth: 6 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: f/4–f/∞
• coating durability: highly resistant to scratches, humidity and aging
• optical characteristics: parfocal, diffraction-limited
This filter enables astrophotographers to capture hydrogen nebula structures with excellent contrast and fine detail even in demanding observing conditions.
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