NGC 1333 - reflection nebula in the constellation Perseus.
Captured during the first night of the Pleiades/California mosaic (visible middle in the right edge of the mosaic) under the dark skies near Puchenstuben in the Lower Austrian Prealps.
decrepit second mobile power supply for my new mount, exceptionally using my daylight camera > wrong flattener distance > cropping, for whatever reason PixInsight has problems with the bias calibration of the flat frames with the 5D mk IV raws.
But despite everything, i gave the data a chance.
Canon EOS 5d mk IV
SkyWatcher Esprit ED80 Triplet Apo
SkyWatcher AZ-EQ6 GT
Lacerta MGEN II Autoguider
Software: PixInsight, PS