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Spots are small roughly round shaped artifacts on photos. For scenic places, use [locations] instead.

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That is dust on the sensor (well the IR filter over your sensor), dust specks in the lens are not capable of causing spots on the image like this. The reason you can see them at a small aperture and … . At a wider aperture the incident light basically goes AROUND the dust particles, and therefore cannot cause such a defined shadow. Edited to add: Dust on the surface of FILM will always cause spots on an image, at any aperture. …
answered Oct 28 '15 by Digital Lightcraft