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The Optolong SHO narrowband filter set is designed for use with astronomical monochrome CCD, CMOS and DSLR cameras. These filters set are commonly used by astrophotographers to present their photos in Hubble Palette. This filter set includes H-Alpha 7nm, SII 6.5nm and OIII 6.5nm, covering the emission lines of 656.3nm, 671.6nma and 500.7nm respectively. The filters provide high transmittance in order to obtain the maximum contrast of nebulae while cutting out background emission and suppressing bright starlight.
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