M42 Faint nebulosity boost, Kees Scherer

M42 Faint nebulosity boost

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Description

To bring out faint details in nebulosity i converted the colour image to grayscale, inverted and applied multiple curve contrast boosts. The official name for the technique is :"inverted gray-scale image, with enhanced contrast in the low surface brightness levels" .

Exposures: 48x10sec iso400+63x180sec iso1600+ 36x300 sec iso1600. Stacked in DSS (separate per exposure setting) with flatframes and bias frames. Combined in Pixinsight with HDRComposition and further processed in Pixinsight (different workflow: no DBE, no background calibration, no colour calibration. Histogram strtetch, HDRMultiscaletransform, slight curves adjustments, grayscale conversion, invert, multiple curve contrast boosts.



{november 14,15,16,17 2015) SQM 20.8

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Histogram

M42 Faint nebulosity boost, Kees Scherer

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Cloudy Nights