sensor dust(?), again

[tibbitts]

I have an interesting problem with my K100d (1+yr old, only 4500 exposures.) I get lots of junk on the sensor, probably because I'm always changing lenses in less than pristine environments.

Until this month, just blowing, or using a sensor brush, has solved my sensor cleaning problems. But now I have a spot that doesn't look like the usual dust. Generally even with my wide angle lens at f16+, dust shows up as somewhat of a fuzzy "blob" (much less fuzzy than at f4 or whatever, of course.) But this new spot is much sharper - more like a dark colored group of slightly fuzzy pixels (maybe 10 or so pixels in size.) Still not sharp, just sharper than all the other dust spots. It looks, at f4, like regular dust looks at f16.

So I resorted to the usual tool with a pad attached, and cleaning fluid. I started out gently, with little fluid and pressure, but eventually wound up wiping the sensor pretty enthusiastically with a soaking wet pad. And of course I checked after every attempt. I moved all kinds of other junk around on the sensor, but nothing I did had any effect on this one spot at all.

Any other suggestions? Obviously I can, generally, work around it in post-processing, but it's pretty ugly at small apertures (and in the sky area, of course.)

Ironically, I have an annoying spot in the viewfinder (the only one) in almost exactly the same place as the sensor spot, which I guess is convenient in that it reminds me where the spot will be. At least it's "what you see is what you get."

Paul

[Gooshin]

i had those on my k100d

keep scrubbing, i felt like i was going to break my sensor, but i didnt, camera still works perfectly.