Olympus-OM
[Top] [All Lists]

Re: [OM] Olympus 12mm is not 12mm?

Subject: Re: [OM] Olympus 12mm is not 12mm?
From: Moose <olymoose@xxxxxxxxx>
Date: Wed, 01 Jul 2015 13:16:02 -0700
On 6/30/2015 6:04 AM, Bob Whitmire wrote:
The landscape does not seem to suffer, if indeed you moved for the second
shot. With the engine, things don't look quite right. But then if it's
  for-the-record shot, it doesn't matter.

I hate to admit it, especially here, but it was a bored, what do I do now, shot. I don't have the same railroad bug that so many here enjoy, and had been in the museum long enough, but Carol was still engaged. I saw the little girl against the big engine, took a shot, then thought to take another from a different vantage point.

Had I thought of it as photography, not railroad, and panorama, I'd have done a much better job. Also, the train was only partially restored to photogenic glory.

Do you correct distortion before stitching?

Yes I think it makes a difference in the quality of the stitch, and remember doing it in the old days, although not whether I did for that loooong locomotive. I doubt if I did for Mossbrae Falls, as that 17-35 mm zoom has very low linear distortion at 35 mm.

With my current µ4/3 gear, the lenses are distortion corrected in conversion, unless one goes to some trouble to avoid it. As I've posted examples showing, the default correction is not perfect at the short end of the 12-50. But at the longer focal lengths I've been using for panorama series, there is little anyway.

On my first attempts I did not,
but with the few I double-shot this past trip, I tried correcting the
distortion before stitching. _Seemed_ to work. The final product was closer
to a real rectangle than the stitches done without distortion correction.

Question for the exceptionally anal among us: If you stitch a pano, and
then use LR's distortion correction, and you spitting in the wind? It would
seem to me you are, as the stitch provides an image that would not fit any
existing lens's profile.
There are two options, no? Auto/profile, which won't match, and Manual, which you could use, to see if it adds anything. In the PS stitcher, there are several options, which do different things to the corners.

Stitched Up Moose

--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/

<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz