Astronomik H-alpha 6nm Clip-Filter EOS R APS-C (SKU: 10220091 / 8h11vh) all astro filters opinie

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The Astronomik H-alpha 6nm Clip-Filter EOS R APS-C (Astronomik, SKU: 10220091 / 8h11vh) is a narrowband emission filter designed for Canon EOS R APS-C mirrorless cameras. This model was developed for imaging HII regions, both under light-polluted skies and at dark observing sites. Thanks to its 6 nm Full Width Half Maximum bandwidth, the filter effectively increases the contrast between objects emitting light in the H-alpha 656 nm line and the sky background, allowing long-exposure imaging with high contrast. The version with MFR coating is intended for use with conventional optical systems and can be used in instruments with focal ratios from f/4 to f/15 without visible loss of performance.

Key features

• narrowband H-alpha filter for Canon EOS R APS-C cameras
• designed for imaging HII regions
• 6 nm Full Width Half Maximum bandwidth
• high image contrast thanks to effective suppression of the sky background
• blocking of unwanted light outside the H-alpha line from UV to IR
• MFR coating for use with conventional optical systems
• can be used in instruments with focal ratios from f/4 to f/15
• high transmission at the H-alpha 656 nm line
• helps reduce the number of stars in the frame compared to 12 nm filters
• parfocal with other Astronomik filters
• the filter is not intended for solar observation

Box contents

• Astronomik H-alpha 6nm Clip-Filter EOS R APS-C
• filter storage box

Technical specifications

• manufacturer: Astronomik
• product name: H-alpha 6nm Clip-Filter EOS R APS-C
• SKU: 10220091 / 8h11vh
• intended use: imaging HII regions
• camera compatibility: Canon EOS R7, Canon EOS R10, Canon EOS R50, Canon EOS R50 V, Canon EOS R100
• non-compatible lenses: Canon RF 14mm f/1.4 L VCM, Canon RF 28mm F2.8 STM, Canon RF 35mm F1.8 IS Macro STM, Canon RF 85mm F1.2L USM, Canon Extender RF 2x, Canon Extender RF 1.4x
• guaranteed transmission: more than 90% at the H-alpha 656 nm line
• typical transmission: 93% at the H-alpha line
• FWHM: 6 nm
• coating: Astronomik MFR
• recommended focal ratio range: from f/4 to f/15
• glass thickness: 1 mm
• parfocality: yes, with other Astronomik filters
• optical quality: diffraction-limited
• coating resistance: highly resistant to scratches, humidity, and aging
• country of manufacture: Germany