Optolong HSO / SHO 7 nm 1,25 (SKU: SHO-7nm-1,25) all astro filters opinie

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The Optolong HSO 1.25" set is a package of three astronomical filters intended for use in professional astrophotography sets.

Narrowband filters from the HSO palette allow you to take wonderful photos of emission nebulae, such as the famous Pillars of Creation. The small half-width of the Hα, S II and O III bands also allows you to collect photographic material even in unfavorable conditions, such as a full moon.

All filters included in the set are covered with a full multi-layer anti-reflective coating applied using ion implantation techniques. Thanks to this, the coatings are not only optically perfect, but also very durable and scratch-resistant.

The most important features of the Optolong HSO 1.25" filter set

• HSO filters made on high-quality glass substrate
• covered with a full multi-layer coating eliminating reflections and protecting the surface against scratches
• excellent ability to block spectral bands emitted by sodium and mercury lamps

Technical parameters

• filter type: HSO
• filter diameter: 1.25"
• Passband center for the Hα line: 656.3 nm
• half bandwidth (FWHM) for the Hα line: 7 nm
• transmission for the Hα line band: >90%
• Passband center for S II line: 672 nm
• half bandwidth (FWHM) for the S II line: 6.5 nm
• transmission for the S II line band: >90%
• Passband center for O III line: 500 nm
• half bandwidth (FWHM) for the O III line: 6.5 nm
• transmission for the O III line band: >90%
• anti-reflective coating: full multi-layer coating (FMC)
• filter thickness: 2 mm
• frame color: black

Set elements

• Optolong Hα 1.25" filter
• Optolong S II 1.25" filter
• Optolong O III 1.25" filter

Guarantee

24 months