Moose is absolutely right. The distortion is most certainly there.
There are other images (not included for other reasons) where it is
more visible. I was a bit surprised to see that in a fixed focal
length lens that is not particularly wide--25mm is the normal lens on
a 4/3 camera. I suppose that is one of the compromises Olympus had to
make in order to make the lens so small and light.
I will take a look at PTLens once Lightroom 2 is out of beta so that I
can run it as a Lightroom plug-in.
Nathan
Nathan Wajsman
Alicante, Spain
http://www.frozenlight.eu
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On Jul 20, 2008, at 3:21 AM, Moose wrote:
> Jim Nichols wrote:
>> Nathan,
>>
>> Very nice pictorial tour of Brighton's attractions. Thanks for
>> sharing.
>> The 25mm pancake seems pretty versatile, and I don't see any
>> evidence of the reported barrel distortion in your images.
> It's certainly there. Nothing like WA on many digicams, but just
> slightly worse than the OM 24/2.8 on 4/3. PTLens doesn't have a
> profile
> for the DZ 25/2.8 yet, so I tried the one for the OM 24/2.8. It very
> slightly under corrects, which is better than over.
>
> It can be seen in several of the images with straight lines in them,
> including the horizon, if one looks for it.
>
> Most obvious example of where it is and isn't obvious is "INDEED",
> where
> applying correction much improves the right edge, but equal correction
> has little visual impact on the rest of the image.
> <http://www.moosemystic.net/Gallery/Others/Wajsman/Indeed.htm>
>
>> I suppose some people just like to find a point to quibble over.
>>
> Yup.
>
> For these images, no problem. For architectural work, it would be an
> obvious problem.
>
> Moose
>
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