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Data from kjromine on reddit astrophotography:
https://www.reddit.com/r/astrophotography/comments/5keuqu/rosette_nebula/

Processing:

Followed: Astrophotography Image Processing Basic Work Flow

Raw convert with lens profile (just selected one to reduce light fall-off).

No darks, no flats, no bias.

Stacked in DSS. No calibration selected, Save DSS stack result as 16-bit tif with embed stretch but do not apply.

rnc-color-stretch: rootpower = 200, rootpower2 = 6, scurve1

Final tweaks with curves in photoshop (mainly to correct uneven background).

A photoshop ACR raw settings file: DSC_0164.xmp. All images used these settings.