I have discovered that I have a very dirty imager chip on on my D300. A result, no doubt, from my recent adventures in the Mojave Desert.
The dust remains on the sensor. I haven't cleaned it yet. Can I use some kind of blank image of the dust ONLY to subtract the sensor dust errors from many images?
I was thinking that, if I shot a white card at F22, I could image just the dust and somehow use this image to subtract the dust from my pictures.
Anyone done this successfully? Any strategies to share?
I do understand that you can manually heal a single image in ACR and then allow ACR to process other images from that repair data. I'm trying to avoid doing this manually, since I can't seem to do a good enough job with the healing tool in ACR. Clear, featureless skies are hard to heal.
Thanks for any suggestions.
Peter