My longest total integration time on a single object since starting the hobby – almost 15 hours over 3 nights. This was a really challenging target with my unmodified DSLR, but I think the limitation in Ha allows some really nice color contrast.
IC1848 – Soul Nebula
Southeast Massachusetts (Bortle 6)
November 2025
Camera: Canon 70D (unmodified)
Telescope: William Optics GT81 IV + Stellarvue SFFX1 Flattener
Mount: Sky-Watcher EQM-35 Pro
Guide: ZWO ASI120MM Mini + 50mm Guide Scope
Filter: None
Control: Mele Quieter 4C running N.I.N.A., PHD2, Green Swamp Server
Exposure: 120s × 437 subs, ~14.5 hours total
ISO: 400
Calibration: 30 Darks, 30 Flats, 50 Bias
Linear processing in Siril: calibration, stacking, Seti Astro AutoBGE, Graxpert denoise, SPCC, Starnet++
Stretching, saturation adjustments, star recombination done in Photoshop
by ThinkHappyThots