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Detecting Dust on the CMOS Sensor (Dust Alert)Dust Alert is a function that detects dust adhering to the CMOS sensor and visually displays the location of the dust.
You can save an image indicating the dust location and display it when performing sensor cleaning (p.318).
The following conditions must be met before using the Dust Alert function:
-A DA, DA L, FA J lens or a D FA, FA or F lens that has an s(Auto) position is attached.
-The aperture is set to the sposition when using a lens with an aperture ring.
-The mode dial is set to any mode other than C (Movie).
-The focus mode lever is set to =.
•The exposure time may be extremely long when using the Dust Alert function. Note that if the direction of the lens is changed before processing is complete, dust will not be detected properly.
•Depending on the subject conditions or temperature, dust may not be detected properly.
•The Dust Alert image can only be displayed during sensor cleaning within 30 minutes from the time the image is saved. If more than 30 minutes elapse, save a new Dust Alert image and then perform sensor cleaning.
•The saved Dust Alert image cannot be displayed in Playback mode.
•The Dust Alert image is saved only when an SD Memory Card is inserted.
1Select [Dust Alert] in the
The [Dust Alert] screen appears.
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Appendix