Okay so recently, I bought a used D300 from a fellow CS-er and cavorted around town snapping pictures to test out this lovely body.
However, just few days ago, when I took a picture of the sky, I noticed 3 very obvious grey mini-blobs on that image. I thought it was dust on my lens so I swapped lens and photographed the sky again only the find those 3 exact blobs on the same exact spot on my image again, so I knew it had something to do with the camera's sensor.
Okay spare me for the rant, here's the evidence:
I've already tried blowing the dust off with a 'lens blowing pump' (or however it's correctly termed) but to no avail. Hopefully it's really just stubborn dust on the sensor
Just need professional advice from senior CSers on how I should go about getting rid of this pesky problem without doing any damage on the sensor!
And of course, thank you for actually bothering to spend 5 minutes reading my rant and an additional 5 to type out your solution
(I've already circled those 3 blobs in red for easy identification)