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A surprisingly difficult target. Lots of nice wispy filaments well captured.
There is a dark bay or sinus in the Crab at about 7 o'clock. Curiously your image shows a cigar-like extension of that dark region out beyond the crab, further toward 7 o'clock. Wondering if that is a processing artefact or dust on the sensor or some such, or whether you think it might be real. Haven't seen it in other images, but even the famous NASA one clips the background so one would never know. An artefact seems the most likely explanation.
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