Not visible from Central Europe I can contribute one result from Namibia.

With 17" and 182x I wrote: very large, bright, nearly circular ring; brighter arcs to the east and west; estern arc with a stellar peak; western arc with spots at its end; CS visible without filter; good and positive reaction to [OIII] filter, but best view without filter

sketch: 17", 182x, without filter, NELM 7m0+
IC5148.jpg
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