Good day everyone! i recently bought a Nikon D7000 and i am having issues with dust on my sensor. The dust particles will be very apparent after F8 and above. When i change lens my camera body is facing downwards and i change my lens in my room with no fan running. I already had went for sensor cleaning twice but the problem just keeps coming. And it seems it affects the right side of my screen only.
Does anyone know why is this happening?