03 September 2017
M16 the Eagle nebula. Narrowband in "natural" color
By Josep Drudis
Image taken with a CDK 20" f/6.8 and SBIG STX 16803. Exposure 20.5 hours (Ha: 7.5hs; OIII: 7hs; SII: 4.5hs, RGB: 1.5hs).
Processed mapping the colors in such a way as to reproduce the nebula's optical spectrum.
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