So I have been bothered by sensor dust on my Nikon D80 for a long time now, and finally decided to do something about it. Hoping that a brush from a lens cleaning kit would be sufficiently soft I put the camera in mirror lockup mode and gently brushed what I thought was the sensor behind the mirror. As I've found out later, there is actually a couple of filters on top of the sensor, but as these can not be replaced without replacing the whole sensor it does not make much of a difference. By brushing the filter it seemed like I ruined some sort of coating on top of it (the difference is visible to the naked eye), and I immediately assumed I had ruined the whole thing by scratching it. Taking a couple of test photos seemed to verify my suspicion. I have already started looking into upgrading to the d300, as replacing the sensor seems to cost around $400, but I just started thinking that the filter may not be scratched, but only dirty. What does this look like? Do you think there is any way I can fix the sensor by having it professionally cleaned, or should I suck it up and either upgrade or have the sensor replaced?
picture of the sky at f/22:
picture of the sky at f/3.5:
picture of the sky at f/22:
picture of the sky at f/3.5: