Strange fringe pattern on long exposure photo

Question

While compositing a series of long exposure images, I noticed this strange fringe-like pattern getting brighter at each layer blended in "lighten" mode. It features a circle and a cross in the middle and those deformed lines around it, sightly brighter than the rest of the image. It looks like a lens issue, but I've shot some sky photos with it before, like this one shot on the same location, so I think a badly placed light source could be the cause of this effect.

Lens: Vivitar 28-210mm F3.5-5.6 AF Zoom

Camera: Canon t5i

Shot at 28mm F3.5, 20 images of 30s each, raw, no camera denoise.

Is there a way to remove such pattern? Is it something common in this kind of setup?

do you see same pattern during day? do you see same pattern with shorter exposure? do you use any filters in front of the lens? — aaaaa says reinstate Monica, Jan 04 '18 at 00:54
@aaaaaa no, I've never seen such a thing. again, I took the other referred image on the same night and couldn't find such pattern. I was using a UV filter. — , Jan 04 '18 at 01:25
Speculation: An interference pattern, like Newton’s rings, from some layer of the sensor assembly, made visible by monochromatic light in the night sky (e.g. sodium light pollution or oxygen airglow lines). — coneslayer, Jan 04 '18 at 03:34
The perfect geometric pattern leads me to believe this is algorithm-induced moiré, rather than phyiscally-induced interference. I think we've seen something like this before. Did you use any lens profile correction in your processing (such as in Lightroom)? — scottbb, Jan 04 '18 at 04:51
Related, very similar: What causes and how can I avoid this moiré pattern in a composite night sky photograph? — scottbb, Jan 04 '18 at 04:53
Found it. Here's the one where a moiré was introduced by LR lens profile correction: Night Photography Moire - Nikon D810 — scottbb, Jan 04 '18 at 05:27
I'm very thankful, @scottbb. I was using lens profile correction in Rawstudio when converting the raw to jpeg. solved. — , Jan 04 '18 at 17:33

Strange fringe pattern on long exposure photo

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