Originally posted by bertwert To see dust spots, take a photo of a light coloured plain background, such as a clear blue sky, with the aperture stopped down all the way and out of focus. Any spots seen would be dust particles. In order to remove them, I highly recommend the Pentax O-ICK1 stick, it's very simple and easy to use. Just remember the dust spots on the photo are flipped when on the sensor (the sensor sees upside down as to what it outputs).
EDIT - further thoughts: I see you have a cleaning kit, try using the camera 'Dust removal' feature first. This shakes the sensor to try and remove dust. Followed by using the blower (however, I have not had much luck using these as it tends to just preposition the dust on the sensor). If these don't work, then use the cleaning kit according to directions and make sure you know what you're going to do before starting. Don't touch the sensor with anything not designed to touch it, such as a brush or LensPen thingy. And remember to have a full battery when putting the camera in sensor cleaning mode.
I just used the air blower ,then i took some photos quick , outside pics , not inside, that may helped. I took some pics of inside of apartment. Still see particles, small , and large , lots of them. I thnk there is a lot of dust in it, because they may move around. Not sure what the problem is .
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Last edited by zzxxcc_penthouse; 03-21-2020 at 04:25 PM.