Large Magellanic Cloud - concentric rings

[astropixel]

While this forum is something of an art gallery, may I seek the assistance of a professional to comment on an aspect of the attached images. In particular the concentric rings on the top left edge of the image. LMC.

11 frames x 2.5 minutes iso800 - cooled, spectrum enhanced Canon 1000D/Xs/Kiss F, 7degrees C.

Many thanks,

Rowland.

[astropixel]

Crops - Tarantula Nebula - concentric rings above and slightly to the left.

[Nocturnal]

Sorry, I don't see the problem. Looks like a good image to me

[astropixel]

Thanks Sander I am now informed that the object is N70, a bubble nebula. At 200mm FL I didn't expect to see this kind of detail. Then again this was imaged at a dark sight.

[Nocturnal]

Yeah, I saw that and thought it was an object but didn't look it up. Cool!