M17 About 12 hrs. Narrowband. RGB stars. 130mm Petzval Refractor f/5.4 FL 700mm. Zwo ASI1600. ASI120 guide camera
The ionized gases of nebula are represented here using the Hubble Palette for color images. Sulphur II, Hydrogen Alpha & Oxygen III produce light in the red, red-orange and green wavelengths respectively. Here they are spread more fully across the visible spectrum for color contrast purposes to Red,Green & Blue. The variety of intermediate colors indicate the presence of multiple gases, but also the broadening of the very narrow bands (7nm wide) of captured data into, say, the 350 nm wide visible spectrum we think of from Red to Violet.
M17 About 12 hrs. Narrowband. RGB stars. 130mm Petzval Refractor f/5.4 FL 700mm. Zwo ASI1600. ASI120 guide camera
The ionized gases of nebula are represented here using the Hubble Palette for color images. Sulphur II, Hydrogen Alpha & Oxygen III produce light in the red, red-orange and green wavelengths respectively. Here they are spread more fully across the visible spectrum for color contrast purposes to Red,Green & Blue. The variety of intermediate colors indicate the presence of multiple gases, but also the broadening of the very narrow bands (7nm wide) of captured data into, say, the 350 nm wide visible spectrum we think of from Red to Violet.