Chuck:
Thanks. I will see what I can do.
It is nevertheless unfortunate that a seemingly good quality lens has such a
severe defect and that reliance has to be placed on outside fixes.
Although the barrel distortion is most evident on the horizon I have to assume
that this optical distortion is present across the entire image. If this is the
case and if one was to enlarge just a small portion of the digital image the
barrel distortion would / could be noticeably evident on what should be
straight lines..
Here
www.johnhudsonphoto.com/470.html
there is evidence of both barrel and pin cushion distortion. This was was taken
with the 40-150mm zoom. This is a candidate for some fix it treatment as well.
John H
----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Friday, 22 September, 2006 10:37 AM
Subject: [OM] Re: Olympus 11-22mm / f2.8-3.5 digital zoom
> You can start here with PanoTools and a brief tutorial on using a subset
> of PanoTools for barrel distortion correction.
> <http://www.dpreview.com/learn/?/Image_Techniques/Barrel_Distortion_Correction_01.htm>
> PanoTools is a freebie that provides the basic engine for panorama and
> other image manipulation software.
>
> Or you can use PTLens <http://epaperpress.com/ptlens/index.html> which
> costs $15 but has a free trial version. Also does vignetting,
> perspective and chromatic abberation. Used to be free. Operates from a
> lens database. Service includes calibration assistance for your lens to
> be added to the database if it's not there already. All Oly 4/3 lenses
> are in the database already.
>
> Waiting to see the corrected version...
> Chuck Norcutt
>
>
> John Hudson wrote:
> >
> > ----- Original Message -----
> > From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>
> > To: <olympus@xxxxxxxxxx>
> > Sent: Friday, 22 September, 2006 08:18 AM
> > Subject: [OM] Re: Olympus 11-22mm / f2.8-3.5 digital zoom
> >
> >
> >
> >>All good stuff but I actually like your 14-45 shot best of all. But the
> >>barrel distortion is very noticeable on the horizon. Should be easy to
> >>fix though in post processing.
> >
> >
> > Chuck: Please point me in the direction of PS version 6 and tell me how.
> >
> > John H
> >
> >
> >
> >
> >>Chuck Norcutt
> >>
> >>John Hudson wrote:
> >>
> >>
> >>>Taken outdoors with the 7-14
> >>>http://www.johnhudsonphoto.com/453.html
> >>>
> >>>Taken indoors with the 7-14
> >>>http://www.johnhudsonphoto.com/486.html
> >>>http://www.johnhudsonphoto.com/487.html
> >>>
> >>>Taken with the 14-45 zoom
> >>>http://www.johnhudsonphoto.com/504.html
> >>>Notice the barrel distortion. This is one reason I am looking for a
> >
> > better
> >
> >>>option than the 14-45 zoom.
> >>>The 11-22 looks to be the better choice.
> >>
> >>
> >>
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> >
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