Here is the same veil as below with 220 minutes of OIII added. The green is synthetic (80% OIII and 20% Ha). I have seen bi-color images in which the OIII shines as blue, but my blue channel here is too weak. Whether from the lower blue response of my camera, that I do not have enough time on OIII, the reddening of the sky above my light-polluted backyard, or all of these, the Ha overwhelms the blue. The night I collected OIII was also pretty hazy. The effect of the blue in this image is therefore only to lighten/whiten the red.
Telescope: Astro-Tech AT111EDT and William Optics AFR-IV (eff. at f/5.6)
Camera and Exposure: SXVF-H9 Ha: 12x1200" (6nm Ha) + 12x900" (12nm Ha+NII); OIII: 11x1200". Alnitak Flat-man flats
Filters: Astronomik 6nm Ha, 12nm OIII
Guiding: SX Lodestar and SX OAG
Mount: Takahashi NJP
Software: Nebulosity, Photoshop CS3, Registar
Location: The Woodlands, TX
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