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Baader HSO 36 mm 6.5 nm CMOS-optimized is a complete set of astronomical filters covering the HSO palette, intended for use in professional astrophotographic sets based on instruments with light in the f / 10 to f / 3.5 range. The filters were designed taking into account the quantum efficiency typical for CMOS matrices and the signal to noise ratio, thanks to which it was possible to achieve equal weights between the Hα, S II and O III bands.
All filters included in the kit are characterized by a very narrow transmission band (FWHM = 6.5 nm) and a high, exceeding 90 percent transmission capacity. The standard efficiency in the transmission band goes hand in hand with the ability to block the remaining spectral lines by almost one hundred percent, including light pollution emitted by mercury lamps (435.8 nm, 546.1 nm, 577 nm, 578, 1 nm) and sodium (598 nm, 589.6 nm, 615.4 nm, 616.1 nm). For the sake of full parafocal character, each filter was mounted on a 2 mm thick glass substrate.
In order to protect against glare, the manufacturer used the excellent Baader Reflex-Blocker ™ coating, as well as the darkened edges of the lenses. This type of connection, together with a very narrow transmission window in each of the HSO bands, makes the Baader HSO 36 mm 6.5 nm CMOS-optimized set offer the user an unprecedented image quality. especially in terms of contrast.
Each filter is made with Life-Coat ™ technology developed by Baader, which guarantees long life and prevents flaking and other types of degradation.
Attention! The Baader HSO 36 mm 6.5 nm CMOS-optimized kit must not be used for visual observations of the Sun under any circumstances. • professional narrowband filters with a half width of 6.5 nm for each band of the HSO palette • optimization in relation to CMOS type matrices allowing for achieving equal weights in Hα, S II and O III channels • identical filter diameters to ensure full parfocalness • Baader Reflex-Blocker ™ anti-reflective layer and darkened filter edges to eliminate unwanted glare and halo effect • Baader Life-Coat ™ technology that guarantees full resistance of the filters to a number of environmental factors • type of filters: narrowband filters, full range of HSO • diameter of the filters: 36 mm • filter thickness: 2 mm • compatible lenses: f / 10 - f / 3.5 • weights of the channels Hα: S II: O III: 1: 1: 1 • Passband midpoint for the Hα line: 656.3 nm • half bandwidth (FWHM) for the Hα line: 6.5 nm • transmission for the Hα line band:> 90% • Center of passband on S II line: 672 nm • half bandwidth (FWHM) for the S II line: 6.5 nm • transmission for the S II line band:> 90% • Center of passband for O III line: 500 nm • half bandwidth (FWHM) for O III line: 6.5 nm • transmission for line band O III:> 90% • anti-reflective coating: Baader Reflex-Blocker ™ coating • surface finishing: plane polishing • surface treatment: Baader Life-Coat ™ • Baader CMOS Optimized Hα 36 mm narrowband filter • Baader CMOS Optimized S II 36 mm narrowband filter • Baader CMOS Optimized O III 36 mm narrowband filter Limited Lifetime Manufacturer's Warranty (The warranty does not cover damage caused by improper use and physical damage due to improper storage or cleaning)



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