The centre of the Galaxy area in Sagittarius and Scorpius rising in the east, from Australia, on March 30/31, 2014. All of Scorpius is visible as well as Norma, Ara, Lupus and most of Sagittarius. This is stack of 4 x 4 minute exposures at f/2.8 with the 15mm full-frame fish eye lens and Canon 60Da at ISO 800. The ground is mostly from one layer. The stars are softened slightly with a gaussian blur layer.
A portrait of the complex of emission nebulas in central Cygnus near the bright star Gamma Cygni (at left). The field includes the IC 1318 complex around Gamma Cygni itself and the Wolf-Rayet arc of nebulosity, NGC 6888, aka the Crescent Nebula, at right. The sparse star cluster Messier 29 is at bottom. This was through the SharpStar 94mm apo refractor at f/4.4 and with the Canon EOS Ra. It is a blend of 6 x 6-minute exposures at ISO 1600 through an Astronomik UV-IR-Cut filter for the base image, and a stack of 4 x 12-minutes at ISO 3200 through IDAS NB1 and Optolong L-eNhance filters for the enhanced red nebulosity, plus 6 x 12-minutes at ISO 3200 through Optolong L-eXtreme and IDAS NBZ filters which contribute only the enhanced cyan OIII emission, all taken as part of testing the filters. Normally, using four filters would not be required! Autoguided and dithered on this warm summer night with the Lacerta MGEN3 autoguider. No darks or LENR applied as the dithering effectively eliminated the thermal noise speckling which was prominent on the individual sub-frames. Taken from home August 13, 2021. All stacked, aligned, and blended in Photoshop.
