Description
The cost of sending a DSLR to a professional cleaning service is about £45 each time. You may need/want to clean the sensor 3 ~ 4 times a year if you have more than one lens or dismount the lens at all.
If you have a several lenses and change them over, then micro dust motes will enter the sensor/mirror cavity and eventually will settle on the sensor. Most of these dust motes are so small that they are invisible to the naked eye but because the image produced by the sensor, the dust mote will show up as a fuzzy dark spot.

















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