Astronomik HSO 6nm Filter Set 2 (M48) (SKU: 10228200 / 8h11rw) all astro filters opinie

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Astronomik HSO 6nm Filterset 2" (M48) (Astronomik, SKU: 10228200 / 8h11rw) is a set of three narrowband emission line filters: H-alpha, SII and OIII with a 6nm bandwidth. The set enables the creation of HSO (Hubble palette) images, reproducing emission nebula structures in characteristic false colors. It is a cost-effective solution for advanced narrowband astrophotography.

Key features

• includes H-alpha, SII and OIII 6nm filters
• enables imaging in the HSO (Hubble Space Telescope style) palette
• ideal for capturing faint objects in star-rich Milky Way regions
• reduces the number of stars in the image compared to 12nm filters
• suitable for cameras with very low dark current
• recommended for imaging under heavy light pollution
• Astronomik MFR coating providing excellent out-of-band blocking (UV–IR)
• no halos and minimal scattered light
• parfocal with other Astronomik filters
• diffraction-limited design – no loss of resolution or contrast
• strict quality control and individual spectral measurement

Box contents

• H-alpha 6nm filter 2" (M48)
• SII 6nm filter 2" (M48)
• OIII 6nm filter 2" (M48)
• high-quality, durable filter storage boxes

Technical specifications

• bandwidth (FWHM): 6nm
• mounting size: 2" (M48 thread)
• guaranteed transmission >90% at H-alpha (656nm)
• typical transmission 93% at H-alpha
• guaranteed transmission >90% at both SII lines (671.7nm and 673.0nm)
• typical transmission 93% at SII lines
• guaranteed transmission >88% at OIII main line (501nm)
• typical transmission 92% at OIII main line
• recommended focal ratio range: 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 HSO 6nm filter set provides a powerful tool for advanced narrowband astrophotography, delivering high contrast and precise nebular detail even under demanding observing conditions. The H-alpha filter must not be used for solar observation.