Archived posting to the Leica Users Group, 2004/01/28

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Subject: Re: [Leica] More Digilux 2 images
From: Mark Rabiner <mark@rabinergroup.com>
Date: Wed, 28 Jan 2004 11:34:04 -0800

On 1/27/04 12:19 PM, "Michiel Fokkema" <michiel.fokkema@wanadoo.nl> wrote:

> Hello Ted,
> 
> I think I see barrel distortion a bit in the second picture and a lot in
> the third picture.
> Distortion is when straight lines look bend in the picture. If they bend
> inwards it is pincushion distortion, when they bend outwards it is
> barrel distortion. This type of distortion is very hard to correct in
> zoom lenses. In the wide range you have barrel distortion that changes
> to pincushion distortion in the tele range. It does not disapear when
> the lens is stopped down.
> You probably were never very aware of distortion because quality lenses
> are well corrected. One exception is the Leica 28-70, that is so bad in
> this respect that I sold it as fast as I could.
> Nice thing of digital images is that you can correct these distortions.
> Don't ask me how because I don't know, I also use high quality lenses:-)
> 
> Best regards,
> 
> 
> Michiel Fokkema
> 
You take the barrel distortion out in software.
:)
Mark Rabiner
Photography
Portland, Oregon
http://rabinergroup.com/Catagorypages/PersonalWork.html




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