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

[Wayne Harridge]

> 
> 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 ?

...Wayne



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