Sona A! 200MP pixel shift sample noisy and with CA

If you look at this sample:
https://www.dpreview.com/files/p/art...18_PSMS16.jpeg

taken at ISO 100 what strikes is the relatively high amount of colour
noise (visible on the blue body of the car or on the gray walls of the
building in the rear).
And there are chromatic aberrations, even in the centre of the image,
for instance on the pipe running vertically along the building, the
lamppost and everywhere else in the image. Now very wide (a few pixel at
most), but noticeable.

Now this is a composite of 16 images of a full frame camera taken at ISO
100. There shouldn't be any visible noise at this ISO level, also
considering that 16 images were combined (and this should have reduced
the noise).

Regarding the chromatic aberrations, it seems that these were not
automatically removed by the software which combined the 16 shots into one.
--
Alfred Molon

Olympus 4/3 and micro 4/3 cameras forum at
https://groups.io/g/myolympus
https://myolympus.org/ photo sharing site