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: mark at rabinergroup.com (Mark Rabiner)
Date: Wed May 19 20:42:31 2004

On 5/19/04 8:52 AM, "Douglas Herr" <telyt@earthlink.net> wrote:

> 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
> 
Slow moving Buffalo keep to the right!
> 
> Doug Herr
> Birdman of Sacramento
> http://www.wildlightphoto.com
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Mark Rabiner
Photography
Portland Oregon



New-improved
http://rabinergroup.com/




In reply to: Message from telyt at earthlink.net (Douglas Herr) (PS RE: converging parallels (was: [Leica] 50mm lenses should be compulsory.))