Jann Lipka
Posts: 57
Location: Stockholm, Sweden
Registered: 20 Jun 2009
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Horisontal pole panorama question
Posted: 26 Mar 2011 at 7:47 GMT
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I wonder if there is some importance to pole flex while shooting in horisontal position ( like outside a window, or over a cliff ).
The pole is bending a bit ( maybe 30 mm ) but as the camera rotates ( with a part of the pole ) its flex remains roughly the same ...
I have shot just a couple of this kind of panos and found it difficult to stich - so I'm looking for problem areas to solve.
Any thoughts from someone that has more experience withthis kind of panos ?
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Juergen Schrader
Posts: 219
Location: Germany
Registered: 14 Jul 2006
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Re: Horisontal pole panorama question
Posted: 26 Mar 2011 at 11:04 GMT
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Well, the important point is "roughly".
From my recent experiences I can say that I always ran into more or less trouble when shooting from vertical positions.
I have prepared a solution but haven't had the time to test it.
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Jann Lipka
Posts: 57
Location: Stockholm, Sweden
Registered: 20 Jun 2009
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Re: Horisontal pole panorama question
Posted: 26 Mar 2011 at 11:07 GMT
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Now I'm curious - is the solution different from simply getting a VERY rigid pole ? ( like a thick paipe or profile ) that doesn't bend ?
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Cameleer
Posts: 35
Location: Ventura, United States
Registered: 1 Aug 2007
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Re: Horisontal pole panorama question
Posted: 26 Mar 2011 at 12:52 GMT
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The pole flex wont cause any problem as long as the camera stays in the same place as you rotate it, although the pole could show up some in the photo.
It is far easier to use a good rigid pole.
Here’s a tour I did and on #13 you can see me holding the pole.
www.indiavrtours.com/tigers/tour.html
I had the pole extended out far and it was binding some, also hard to keep the camera in the same place. Took a lot of Photoshop work to fix the area where I was at the base of the pole.
Just go out there and practice keeping the pole steady. When I’m knelling down I often have the pole under one leg and over the opposite knee with my hand on my knee holding the pole as my other hand turns the pole.
Roger Berry
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Doug Aurand
Posts: 3282
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: Horisontal pole panorama question
Posted: 26 Mar 2011 at 15:28 GMT
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Jann
You didn't mention what camera, lens & panhead you're using
When I did my first vertical pole shoot, I had been using a 2 shot capture with a Coolpix 5400, FC-E9 and an iPIX 5400 rotator for my other work.
But I could see the small 3° overlap of 2 shots might be a problem because there was a little sway & flex in the pole even in a vertical position.
So I added a shot to get substantially more overlap.
One of the outdoor scenes had a little wind and even though I tried to shoot during the pauses, I knew the top of the pole was in slightly different positions for each of the 3 shots.
But with the large overlap, PTGui stitched everything fine. Although the Nadirs were a mess and Zeniths needed some blue sky & clouds to copied over to cover them.
What is it you found "difficult to stitch"?
I ask because what I found was that with the camera moving around a little on top of the pole, I got much bigger Control Point variations than I usually got, but the image alignment was fine.
The larger Control Point variations in this type of situation were to be expected
Doug Aurand
Albuquerque, NM
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Juergen Schrader
Posts: 219
Location: Germany
Registered: 14 Jul 2006
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Re: Horisontal pole panorama question
Posted: 26 Mar 2011 at 17:33 GMT
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Well, I wouldn't mind for outdoor sceneries, they don't cause too much trouble. But as soon as you start to do something like car interiors you'll know what "difficult to stitch" is like 
@ Jann
The answer is yes and no.
Yes because it would help to have a sturdy pole and no because I am going to use kind of a rail.
But even then another major drawback will be that one loses quality in the zenith and nadir areas. So you want them to be in a place where is not too much detail.
I might also do more tests with the lens set to 10 mm instead of 12 or even try to use the 15 mm Canon but I am afraid that might cost too much DOF. Lots of work to do *sigh*
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Jann Lipka
Posts: 57
Location: Stockholm, Sweden
Registered: 20 Jun 2009
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Re: Horisontal pole panorama question
Posted: 27 Mar 2011 at 2:19 GMT
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Outdoor scenarioas are easy ,
Car interiours and similar are difficult .
I was thinkimg about adapting an aluminium pipe for this kind of images . Maybe 180 cm long , 2 mm thick aluminium,
just one piece of metal - The stup I use Canon 5D + Tok + NN R10 is all together 1800 g heavy . Using telescopic kind of arms introduces more flex also because of all the joints ...
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Juergen Schrader
Posts: 219
Location: Germany
Registered: 14 Jul 2006
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Re: Horisontal pole panorama question
Posted: 27 Mar 2011 at 8:40 GMT
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A rectangular profile would even be more rigid.
Next thing is that light stands are wobbly too when under load, better use your tripods instead. And plenty of weight.
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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Re: Horisontal pole panorama question
Posted: 28 Mar 2011 at 8:32 GMT
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Jann,
you should imagine to take it a little bit longer. You should also have it to the opposite side of the tripod to add 1kg weight to it beyond the tripod.
Heinz
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Juergen Schrader
Posts: 219
Location: Germany
Registered: 14 Jul 2006
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Re: Horisontal pole panorama question
Posted: 28 Mar 2011 at 9:14 GMT
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Just in case, but I guess you will find out anyway *g*: I recommend to use two tripods plus weight.
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hindenhaag
Posts: 729
Location: Netherlands
Registered: 7 Mar 2010
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