[SEL] A Welding Question - Apprentices

[JR504 at aol.com]

Hi again Elden,
I should have been more careful in my reading.  You were saying  "distortion" 
but I was thinking "focus" as I read it.  I miss the  flexibility of my 35mm, 
but love the convenience of my digital camera.
Joe
 
In a message dated 8/19/2007 8:25:00 P.M. Eastern Daylight Time,  
edurand at mchsi.com writes:

Joe:

I don't have a problem with field of focus with a film  camera, providing 
there's enough light to be able to stop the lens down and  get a good exposure.  
With a digital camera (a cheap one like I have)  there is no iris so the 
f-stop cannot be set.  

What I refer to as  distortion is the geometrical distortion.  In other 
words, if you were to  take a photo of a curved data plate, one that's bent around 
a cylinder, for  instance, it would appear to be taller in the center than on 
the ends because  the plate is closer at the center than at the ends.

I was wondering if  there is software that will correct for that distortion.

Take care -  Elden  







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