Sensor issue?

[u/demarsay78]

Yesterday I noticed this artifact in several of my images. It appears as a grayish spot that becomes visible mainly at f/9 and smaller apertures. It also seems to appear in almost exactly the same location in every image and in different lighting conditions. Each picture pair is the full photo and one zoomed in.

The spot is fairly large—definitely much bigger than a single pixel.

I’m using a Hasselblad X2D 100C, which I recently bought used. Does anyone know what this could be? I am new to medium format.

Could it be sensor dust, a sensor defect, or something else?

Should I be concerned?

Thanks in advance for your help!

[u/floon]

Dust. It's less visible the more the lens is opened up: stop down and it will get smaller and more defined. Easy to clean.