Only three of the quartet, NGC 7522 is a bit further out, but NGC 7599, 7590, and 7582 just barely fit the frame. Data from September at IAS Observatory, Hakos, Namibia.

More details at Astrobin.

IAS – Internationale Amateursternwarte e.V. – Hakos Observatory, Namibia
IAS 20″ Alluna RC, f/8 @ 4120 mm, 10 Micron GM 4000 HPS
QHY268M, Baader LRGB
48x L, 21x R, 20x G, 18x B 200s, binning 2×2, gain 56, offset 10, -5C, 20 flats, 50 bias, 20 darks
Data calibration/integration: PixInsight
Image processing: PixInsight, Photoshop, Lightroom