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1259 zł
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price without VAT: 1023,58 zł
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 Shop online:
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Shop in Warsaw (qty):
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Shop in Chorzow (qty):
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The Ha 7 nm photographic filter in a 2" mount (PegasusAstro, SKU: PEG-FLTR-2M-HA) is a narrowband filter designed for astrophotography of emission nebulae in the hydrogen-alpha line. With a 7 nm bandwidth centered at 656 nm, it effectively enhances nebular structures while strongly suppressing unwanted background light.
The filter reduces the transmission of artificial light sources such as high- and low-pressure sodium and mercury vapor lamps, as well as unwanted natural skyglow caused by atmospheric oxygen emission. This makes it a suitable choice for high-contrast narrowband H-alpha imaging, allowing subtle nebular details to be recorded even under light-polluted skies.
Manufactured to photographic standards, the filter features precision-polished glass with 1/4 wavefront accuracy and multilayer anti-reflection coatings. The parfocal design facilitates use in multi-filter imaging setups without the need for refocusing when switching filters. The 2" M48-threaded cell ensures compatibility with standard filter wheels and adapters.
• H-alpha narrowband filter with 7 nm bandwidth
• central wavelength: 656 nm
• suppression of sodium and mercury light pollution
• high contrast for revealing emission nebula details
• parfocal construction for multi-filter imaging setups
• multilayer anti-reflection coatings
• 2" mounted filter with M48 × 0.75 thread
• SKU: PEG-FLTR-2M-HA
• filter size: 2"
• type: narrowband (7 nm)
• central wavelength: 656 nm
• transmission range: Tave > 80% at 656 nm, 7 nm FWHM
• polish: 1/4 wavefront, parfocal
• coatings: multilayer anti-reflection
• shape: round
• thickness: 5 mm (filter) + 2.5 mm (thread), glass thickness 2 mm
• thread: M48 × 0.75
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