Tom Fenwick wrote:
> It's a nuisance in some shots - not people, but lots of other stuff. I went
> as far as trying to correct one in photoshop the other day - it works.
>
> I've found it with all the zooms (14-42, 14-54, 12-60, 11-22) at the wide
> end. I reckon the 14-54 is probably the best in this regard, although the
> others are either a lot cheaper or quite a bit wider so it doesn't count.
> It would have been nice if the prime didn't have it, but I think size was
> their
>
Time for my unpaid, unofficial shill act for PTLens again.
It's dirt cheap and astonishingly good. Reads the EXIF and makes the
correction - like magic. Corrects distortion you might not notice until
you see before and after.
<http://www.moosemystic.net/Gallery/MPhotos/Calif/HearstCastle/CdM01.htm>
Really crucial for architectural work where you are going to do
perspective correction. If you don't correct lens distortion first, you
can end up with nice horizontal and vertical lines that are bowed in the
middle.
<http://www.moosemystic.net/Gallery/MPhotos/Calif/HearstCastle/GStair.htm>
Even with no straight lines at all, before and after make it clear that
shots look more natural corrected.
<http://www.moosemystic.net/Gallery/MPhotos/Calif/Morro%20Bay/Oak01.htm>
http://www.moosemystic.net/Gallery/MPhotos/Calif/Morro%20Bay/OakCan01.htm
I use it all the time and have never noticed any artifacts from the
process. I do any NR before PTLens (or any perspective correction,
etc.), so the noise pattern won't be distorted. I'm not sure if it makes
a practical difference, but should in theory.
I don't know if it violates one of Nathan's personal processing taboos,
but should at least be of assistance to others.
It currently has calibration profiles for these lenses:
Zuiko Digital 7-14mm f/4.0
Zuiko Digital 11-22mm f/2.8-3.5
Zuiko Digital 12-60mm f/2.8-4.0 ED SWD
Zuiko Digital 14-42mm f/3.5-5.6 ED
Zuiko Digital 14-45mm f/3.5-5.6
Leica D Vario-Elmarit 14-50mm f/2.8-3.5
Zuiko Digital 14-54mm f/2.8-3.5
Zuiko Digital 18-180mm f/3.5-6.3 ED
Zuiko Digital 40-150mm f/4.0-5.6 ED
Zuiko Digital 40-150mm f/3.5-4.5
Zuiko Digital 50-200mm f/2.8-3.5
Zuiko Digital 50mm f/2.0 Macro
One of you folks with the 25/2.8 should follow his specs for a
calibration shot for that lens and send it to him.
<http://www.epaperpress.com/ptlens/index.html>
> The 7-14 is the exception, in my limited experience so far - it is as nearly
> perfectly rectilinear as makes no difference.
>
> Tom
>
> 2008/7/15 Jim Nichols <jhnichols@xxxxxxxxxxxxx>:
>
>
>> Rob,
>>
>> I can't speak for the cheapest kit lens, but, with the Zuiko 14-54 that I
>> chose, I have seen no evidence of this.
>>
>> Jim Nichols
>> Tullahoma, TN USA
>> ----- Original Message -----
>> From: "Rob Harrison" <robhar54@xxxxxxxxx>
>> To: <olympus@xxxxxxxxxx>
>> Sent: Tuesday, July 15, 2008 12:57 PM
>> Subject: [OM] Re: 420 and 25/2.8
>>
>>
>>
>>> i have been looking at this combo, for my first foray into DSLRs.
>>> Being an architect, a lot (most) of what I take photos of includes
>>> straight lines...so it is disappointing to hear about the barrel
>>> distortion. :-(
>>>
>>> Is this also a problem with the kit zoom?
>>>
>>> Sean Reid has an interesting take on distortion in wide angles. I'm
>>> still way in the rectilinear camp.
>>>
>>> Rob in Seattle
>>>
>>>
>>> On Jul 15, 2008, at 10:45 AM, Nathan Wajsman wrote:
>>>
>>>
>>>> Definitely good enough. I just finished looking through 87 pictures
>>>> from Brighton and London last week, all taken with this combo. Not bad
>>>> at all for an almost pocketable outfit. My only complaint is the lens
>>>> has noticeable barrel distortion, not something I expected in a fixed
>>>> focal length lens. In your picture it does not matter, but it is
>>>> clearly visible in several of my images that have straight lines in
>>>> them. My pictures of last week, which I will post tonight, will
>>>> contain some examples of this.
>>>>
>>> ==============================================
>>> List usage info: http://www.zuikoholic.com
>>> List nannies: olympusadmin@xxxxxxxxxx
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>>>
>>>
>>
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>>
>
>
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