Sensor dust my beloved, I would do the same with a film camera someday just to see what I get with the same hole size.
>>4406800
It was a deliberated decision, I am taking these with a 3d printed body cap that I just punched a hole with a needle.

[EXIF data available. Click here to show/hide.]
Camera-Specific Properties:Equipment MakePanasonicCamera ModelDMC-GF5Camera SoftwareRawTherapee 5.11Image-Specific Properties:Horizontal Resolution180Vertical Resolution180Image Created2025:02:17 10:01:09Exposure Time1/25 secF-Numberf/0.0Exposure Bias0 EVFlashNo FlashFocal Length0.00 mm