I have a Canon Rebel T6. I'm really newbie and know very little about photography. I think I made and big mistake and accidentally let dust enter the sensor area and the mirror area.
To visualize the dust, I took a picture using f/36.4, ISO 200 and 1/40 sec on an illuminated white surface. The first image has enhanced contrast with GIMP. The second image is without enhanced contrast. You can still see most of the dots. The third is a picture of the sky where you can see some of the dots.
Is this dust or dirt going to affect image quality? I bought the camera new a month ago. I don't know what is causing this, but I can also see dirt and fabric on the viewfinder. I thought it was something on the upper part (over the mirror) and cleaned it with magic fiber.
What else can I do?