[OM] Re: It's happened. I've relented.

Subject: [OM] Re: It's happened. I've relented.
From: Wayne S <om4t@xxxxxxxx>
Date: Wed, 15 Mar 2006 09:01:16 -0500
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.


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