Archived posting to the Leica Users Group, 2004/06/17

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Subject: [Leica] laws of optics...
From: nbeddoe at (Beddoe, Neil)
Date: Thu Jun 17 00:15:46 2004

"Second example, let's imagine a vertical wall with lots of circles painted 
on it (let's call it the Vasarely wall).If you take a picture with the 
lens axis perpendicular to the wall, then ALL the circles will print as 
circles on the picture. If the camera is oblique, then all the circles 
will show as ellipses."

Not quite true.  With anything other than a long telephoto, you'd have to
get close to the wall and this would mean that you'd be viewing the outer
circles from an oblique angle which would render them as ellipses in your
photograph.  This has nothing to do with lens distortion and is just the
normal effect of perspective. 


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Replies: Reply from jean.louchet at (Jean Louchet) ([Leica] laws of optics...)