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Bill Randall

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  1. This was much larger than a bit of dust. I could see it on the sensor. It looked some kind of liquid dripped on on the sensor and hardened. I purchased sensor swabs and cleaner and it took two cleanings to get it all up. Everything is back to normal.
  2. After a number of successful years with the x t20 I notice big dark spot on images. Inspected lens and sensor for what the cause is. It is a large visible spot on the sensor. It looks as if it could to hardened oil but not sure. I have ordered a cleaning kit but a few weeks away. What is the likely source of this stuff? It is not dust so I am assuming oil. I have not changed lenses outside my office, but I recently purchased several used fuji lenses. I tried them all in my office and took each one out and tried it outside. Everything went well until today. I noticed the dark spot on the
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