John Hudson wrote:
> 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.
Not terribyl uncommon, especially in wide angle lenses. But the fix is
easy, especially with PTLens. PTLens can be fed a batch of images and
it will read the EXIF data to find the lens used, lookup the lens'
correction factors in its database and automagically apply them. Not
bad for $15.
>
> 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..
I couldn't see much wrong with the little image below. After putting a
grid over it about all I can see is that it appears to be tilted down to
the right a couple of degrees. If there's other distortion it's small
enough that it's lost to me in the fading line between sky and horizon.
>
> 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.
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