Ouch,
I never knew the zuiko 24/2.8 had that much distortion.
Wiliam
-----Original Message-----
From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
Sent: dinsdag 19 oktober 2010 14:01
To: Olympus Camera Discussion
Subject: Re: [OM] What to buy for architectural photography at a budget?
There are several lenses in the PTLens database courtesy of yours truly.
Three of my four Tokina and Tamron AF lenses and my OM mount Tokina
17/3.5 and Zuiko 24/2.8 as shot on the 5D. Yes, there are fairly
exacting requirements for calibration images, especially considering
that brick buildings are not allowed. You'd think they would be ideal
but they contain lots of rippling from manual assembly.
It took a bit of scouting to find a suitable building but then I
realized it was only a couple of miles away. In the US at least, it was
a common method of construction in the late 50s and early 60s to make
walls largely of glass and aluminum framework. It seems to be
especially common in schools of the era and that's what I used.
These shots are of a nearby elementary school. Tokina 17/3.5 on the
left and Zuiko 24/2.8 on the right. Tom Niemann, author of PTLens,
commented that my calibration images were some of the best and easiest
to calibrate that he has ever received. I attribute that to a good target.
<http://www.chucknorcutt.com/PTLens%20distortion%20tests/index.htm>
Chuck Norcutt
On 10/19/2010 3:56 AM, Piers Hemy wrote:
> I concur with what you say Chuck, save that if it is $25 now, the price
has
> increased considerably since I bought it!
>
> But I did find that the specifications for images to provide for
calibration
> are pretty exacting. It might be better in the circumstances to choose a
> lens which is already in the PT Lens database, r t heed the following
advice
> from the helpfile:
>
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