Only good if you checked the wrong

If you are following the example of the instructions in the network checks (blue sky or white wall) then the good, but who has actually the so brought into the world. Yes is so also in some textbooks.

I have the tip from an acquaintance who earns his money with photography and probably not bad.
And that's even easier than to find a blue sky without clouds and birds or airplanes.

A) lens on the camera, wenns no fixed focal length set the longest focal length
B) F 22
C) close to a new white screen (eg Word document) and go trigger zoom
D) photo should now be gray in Photoshop, because we use Auto white balance
Select E) in Photoshop either AutoCorrect color or contrast (there is also determined in GIMP)
Now you see any dirt on the sensor.
The whole takes less than 2 minutes and is possible at any time day or night.

Here the sensor swaps fall completely, have me now Eclipse, Pac pads and 2x spatula of SensorWand fetched 25 euros completely and keeps a complete camera life.

Although it is claimed no me most term manufacturer or repair operation used anything from VisibleDust.

I bought VisibleDust also, because the reviews but the cleaning result is flawed (after 7 rounds). With the spatula and the pads I have 2 pads worth 20 cents needed and I see on the sensor no longer single spot!