It’s time to get my D200’s image sensor cleaned by a professional. I noticed yesterday when shooting in my “new” studio that the white background was picking up a lot of sensor noise. I took the camera apart, cleaned it out with my hand powered air pump, and took some test shots. Everything looked OK and no spots were visible in the image

Then I thought about it – I’ve got a perfect white background to expose against! I’ll just use the same setup that I took all those studio pictures in. Try it again, load the photos, and then go for worst case. Hitting the levels until the only parts of the histogram left were the parts with data, and then adjusting the contrast, gives me this:

I have no idea what the highlight in the middle of the image is. And yes, I will get the sensor professionally cleaned before I give it to my wife. Again, those spots aren’t visible unless you are trying to see them, and then you have to try hard.