NGC 884 (left) and NGC 869 (right) (Double Cluster)

A tight fit at 1300mm focal length.

Acquisition:

Bortle 2-3 skies
Nikon D7000 camera
Orion Apex 102mm telescope, 1300mm focal length
Orion AstroView EQ3 with single-axis drive
30s x 26 frames
f/12.7
ISO 1600

Processing:

Siril:

Stacking
Background extraction
Photometric color calibration
Auto histogram stretch
Manual histogram adjustment to taste
Slight deconvolution

GIMP:

Chroma and luminance denoising (G'MIC-Qt plugin)
Color curves and black point adjustment to taste