Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 281
NGC281 Composit UHC Ha, Opilio
NGC281 Composit UHC Ha
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NGC281 Composit UHC Ha

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Description

My first composit

12 hours (72x600s) with Astronomik Ha 12nm --> luminance

4 hours (24x300s) with Baader UHC-S --> color

Actually I was a little bit disapointed: 12 hours Ha and still so noisy! I'm still trying to optimize stacking parameters but maybe this is just the normal limitation of a modified but uncooled DSLR.

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NGC281 Composit UHC Ha, Opilio