Archived posting to the Leica Users Group, 2004/05/19

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Subject: PS RE: converging parallels (was: [Leica] 50mm lenses should be compulsory.)
From: telyt at earthlink.net (Douglas Herr)
Date: Wed May 19 08:52:26 2004

Douglas Herr <telyt@earthlink.net> wrote:

> Jeffery Smith <jls@runbox.com> wrote:
>
>> Yikes, I thought all of the perspective control problems in shooting 
>> buildings could be traced to a wide angle lens causing the roof to be 
>> overly small, giving you a trapezoid effect. Don't wide angles distort 
>> things, causing converging parallels?
>
> Converging parallels is what you get when the film plane isn't parallel to the parallel lines.  Has nothing to do 
> with the angle of view - but you _notice_ the convergence more with wide-angle lenses because of the wider 
> field of view.  Try standing in the middle of a straight road - use a long lens, aim the camera so the center line 
> of the road bisects the picture - and see if the edges of the road meet at the horizon.
>

Here's an example of converging parallels with a 280mm lens:

http://wildlightphoto.com/yellowstone/crossing.jpg


Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com

Replies: Reply from mark at rabinergroup.com (Mark Rabiner) (PS RE: converging parallels (was: [Leica] 50mm lenses should be compulsory.))