by Jakub

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Spots are small roughly round shaped artifacts on photos we wouldn't see when looking at the scene.

There are three main causes for these artifacts:

  • Dust or other small particles on optical path at some point, usually on or near the sensor.
  • Flare — unwanted light reflecting inside the lens or camera, sometimes made worse by a low-cost screw-on filter
  • Hot pixels due to failed photosites on the sensor.

For "spots" as scenic places, use instead.

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