6888 (Crescent Nebula) and surroundings (image is reduced-size | other sizes:
5,000 light years
||Takahashi FS-60C @ f/6.2
||Takahashi EM200 Temma II
||QSI 540wsg @ -15C
|| Astrodon Ha (3nm), Astrodon Tru-Balance I-Series LRGB Gen
||6x20min Ha, 2x5min L (bin1x1); 2x5min
ea RGB (bin2x2); AstroArt5, CS4 (slightly cropped, 10xdarks/flats/fdarks/bias)
|23 November 2016 - Las Cruces, NM
Published in Amateur
Astronomy Magazine quarterly, Spring 2017 issue, pg 71 (screenshot).
This image is LHaRGB, where Ha was used in combination with
Luminance and Ha:R (60:40) was used for the Red channel.
Copyright Jeffrey O. Johnson