Astronomik H-alpha 6nm CCD Clip-Filter EOS M (Astronomik, SKU: 10204091 / 8h00s3) is a narrowband emission line filter designed for imaging hydrogen nebulae. It provides extremely high contrast between objects emitting at the H-alpha line (656nm) and the sky background, enabling the capture of faint structures even under heavy light pollution.
• 6nm narrowband H-alpha filter
• maximizes contrast at 656nm
• complete blocking of sodium (Na) and mercury (Hg) vapor lamp emissions, natural airglow and most moonlight
• very effective blocking of unwanted radiation outside 656nm from UV to IR
• reduces the number of stars in the image compared to the 12nm version
• ideal for imaging faint objects in star-rich regions
• suitable for cameras with very low dark current and for heavy light pollution conditions
• integrated IR blocking layer (CCD version)
• parfocal with other Astronomik filters
• diffraction-limited design – no loss of resolution or contrast
• Astronomik MFR coating providing excellent out-of-band blocking and no halos
• strict quality control before shipment
• Astronomik H-alpha 6nm CCD Clip-Filter EOS M
• high-quality, durable filter storage box
• spectral line: H-alpha (656nm)
• bandwidth (FWHM): 6nm
• guaranteed transmission >90% at 656nm
• typical transmission 93% at 656nm
• recommended focal ratio range (MFR): f/4 to f/∞
• glass thickness: 1mm
• finely polished optical glass free from streaks, internal stress and bubbles
• coating: Astronomik MFR
• fully resistant to high humidity and aging effects
The Astronomik H-alpha 6nm CCD filter enables the capture of very faint nebular structures with maximum contrast, especially under demanding observing conditions. The filter must not be used for solar observation.
