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Pinwheel Galaxy (M101) widefield
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Pinwheel Galaxy (M101) widefield

Reddit r/astrophotography·u/alch_emy2·about 1 month ago
#SKd6P0dN
#tier#noise#nights#bias#stack#photo
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Sky: Bortle 8-9/17.8 SQM

Equipment: S24 Ultra (phone) 50MP 5× zoom, MSM Nomad tracker, Didyclips broadband filter

Acquisition: \~32 hours across 8 nights. Darks and Bias included (Though the Bias didn't have much of an effect)

Stacking: batch size \~50-100 (Tier 1), stack Tier 1 batches for single night (Tier 2), stack multiple nights (Tier 3). Siril sigma rejection.

Post-Processing: Siril for green noise removal, GraXpert for gradient correction and denoising, GIMP for stretch,, color noise reduction, star masking and hue adjustments. Light room to fine tune noise and hues, increase contrast.

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