MT Shooter wrote:
I vote for a filter problem, especially since it shows up in ALL your images.
Along that line ["filter problem" ?], but
slightly different ... does the lens have
a nearly flat, or barely curved, element
at the back ? Might be an interference
pattern from light bouncing between
the sensor and rear surface of the lens.
If so, makes sense that it's stronger in
the shadows. And if this is the case it
would not help to angle the camera at
a different angle :-(
Also, if you wet cleaned the sensor and
left some sort of film on it maybe that
is producing an interference layer.
As to "filter problem", nothing mounted
to front of the lens can do this. Even if
you had cemented elements separating,
which will show such a pattern looking
thru the lens [off the camera], lenses
with that problem do not render it as
plainly visible at the image plane.
You do have an unusual problem. Send
the pix to the maker's support unit and
ask them about it.