Sensor Cleaning

The images below were both taken with my Canon 20D at ISO400 and f/32.  The camera was pointed at a cloudy gray sky.  The first image below shows the dust that was on the sensor of my 20D before I cleaned it.  The second picture shows that almost all of the dust was removed after I used the "Copper Hill Method" to clean the sensor.  I usually notice dust only when shooting at small apertures; especially macro.  This time, however, a monster piece of dust got caught on the sensor.  It was located on the upper middle part of the sensor (lower middle in the images) and was so large that it was causing a circle of reduced contrast even in textured images at f/8.  I initially thought it was dirt on the lens.  This definitely demanded a sensor cleaning.  As you can see from the second image below (taken after the cleaning), it went well.  And to think, when I first got my 20D a little over a year ago, I was terrified to even think about cleaning the sensor.  Now it seems so easy.  "Thanks", Copper Hill!

Image below was taken BEFORE cleaning the sensor.

Image below was taken AFTER cleaning the sensor.

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