Bob in Baltimore
Senior Member
I agree. I conducted some tests, pumping the zoom in an out 5 times between shots. It definitely moved some of the dust around, sometimes moving it onto the sensor, sometimes moving across it and sometimes moving it off. Some of the shapes are identifiable, so I am certain that at least some of them were not sucked in by the zoom. Given the accumulation rates, I think that most were already in the camera.S31 wrote:
I somehow don't think that changing focal length is responsible for the vast majority of oil/dust spots in freshly cleaned and repaired D600s
You are right to minimize the possible sources of contamination. It removes any possible critique of your handling of the camera. For the same reason, I did not clean the camera myself until I had two rounds with the camera store.