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Orijinal gönderinin sahibi: Philip Le Riche ,

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If the camera is virtually new, you best bet is surely to get a warranty repair or replacement. It seems unlikely that any dust could have got onto the sensor.

If for any reason warranty is not available, then take an exposure of a white sheet of paper at maximum resolution, Fine compression and no digital zoom. Examine it on your computer at full size. Does the spot have any discernible shape indicating what it might be? Even at Fine compression its image may be affected by compression artefacts causing a halo effect. Using the Canon Hack Dev Kit (Google it) you can take a raw exposure with no compression. A dead pixel could be a possibility - it might appear light on an exposure in complete darkness.

If you go for removal of the sensor to clean it, be aware that making it worse is much easier than making it better.

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