M 42: Orion nebula (Narroband)

(Astronomical images)

Hydrogen-alpha + Oxygen III 191 * 10 seconds (31 minutes)

Sulfur II + Oxygen III: 268 * 20 seconds (1.5 hours)

Equipment: C9.25, 0.63 reducer, ASI533 MC (IMX533 OSC), AVX mount. Askar C1&C2 narrow-ish band filters.

Oxygen-Hydrogen-Sulfur palette.

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