TAKO. INTERNET SEIT 1996.
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Re: [OM] OT: New Sonie lens 20/1.8

Subject: Re: [OM] OT: New Sonie lens 20/1.8
From: Chris Barker <ftog@xxxxxxxxxxxxxx>
Date: Thu, 26 Mar 2020 07:59:35 +0000
I’ve noticed the residue of the image in Capture One Pro, Moose.

The files of my TZ200 vary between JPG and Raw, with latter having the extra 
distorted edges left on.  I suspect that that is what you mean.

Chris

> On 24 Mar 20, at 22:05, Moose <olymoose@xxxxxxxxx> wrote:
> 
> A very interesting (to me, at least) characteristic of the µ4/3 lenses is 
> that they are generally designed with linear distortion undercorrected, to 
> concentrate on better correction of other aberrations. Linear distortion is 
> then corrected in firmware for JPEGs and conversion software for Raw files.
> 
> As WA distortion is always barrel, that means the image gets wider when 
> corrected. To maintain the nominal format dimensions, the sides are cropped. 
> AFAIK, DxO is the only Raw converter that gives the choice of retaining the 
> full, corrected width. I find the difference sometimes significant.

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