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high dyamic range)
correct-image design keeps objects right-side-up and correctly oriented left-to-right
About 90% transmission at major OIII line 500nm (OIII filter )
ZenithStar Racing
Colour Magic 2-inch Duo-band C2 (SII+OIII) Alt-Az Mount high dyamic range)Like the 2" Colour Magic C1 Duo band filter, the C2 Duo band filter is specifically designed for advanced deep sky astrophotographers who are shooting emission nebulae. The C2 filter produces dual narrowband "S II + O III" images for use with one shot color cameras. The Colour Magic C2 is especially useful for astrophotographers who wish to create images in the SHO or "Hubble Palette." Not long ago, doing SHO images required a monochrome astro camera,
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