At 04:31 AM 3/15/2006, you wrote:
>>
>> Take a picture of a clear blue sky with a small aperture. Open in
>> Photoshop. Open Levels and really increase the contrast by
>> moving the
>> end sliders toward the middle. Watch the spots appear. That is
>> assuming you change lenses and have had the camera for a while.
>>
>
>Why do you use a small aperture ?
Since the dust in not directly at the focal point, just like small
apertures increase DOF, they have a similar effect close to the focal
plane, making the dust more in focus.
Wayne
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