Heh, I guess I like vertical photos and shooting counterpoint. Almost 80% of my photos are vertical...
Yeah. The spots are defects. I know. I was kind of depressed when I discovered them on the camera display. They are resultant of a dusty, scratched GND filter.
Mhm ... I scratched it
. I guess now I have to buy a new (better) one
So, take your lesson. If you have filters, and you are going outdoor, always take off the filters, clean them and put them back in your backpack!