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SJ,
The native resolution of your image looks good.
None of that "over processed look" which tends to make the
highly-foreshortened spiral arms of this galaxy seem much thicker than they are.
Good images like yours seem to show that the two principal spiral arms are in reality rather thin, though there is a lot of confusion from a heavy dust screen within this galaxy that builds up due to its unfavourable orientation.
Also, the dust streamers rising up at right angles to the principal plane of this galaxy are well seen in your image: what Malin called a "boiling, steaming interstellar medium" in his picture processing paper about the dust distribution within NGC 253.
Would you say that the HII regions in this galaxy are small?
(It is known that much of the Massive Star formation in N253 is concentrated in the central region, highly obscured by dust)
cheers, Robert
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