The most likely cause is internal reflections from a filter—especially a low-quality or poorly coated UV filter—rather than the camera body. Reflections between the lens and the back of the filter can create circular ring patterns in certain lighting.

To troubleshoot:

• Take the same type of photo with the filter removed.
• Check whether it only happens with one specific lens/filter combination.
• If the rings disappear without the filter, replace it with a better multi-coated filter or shoot without one.

If the problem still appears without the filter, inspect the front and rear lens elements. Damaged coatings on the lens (or less likely the filter) could also contribute. If it happens only sometimes, that still points more toward reflection than a camera fault.

If you confirm it’s the lens rather than the filter, have the lens checked by the manufacturer or a qualified repair specialist.