David Tan
Posts: 155
Location: Kualalumpur, Malaysia
Registered: 31 Mar 2010
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180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 13:47 GMT
updated: 7 Sep 2010 at 13:49 GMT
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If the number of shots required and the length of post processing time are NOT taken into consideration, which lens produces the sharpest 180 rectilinear panoramic photography with the least distortion: Canon 18-55mm OR Canon 10-22mm?
I plan to auto-focus the lens.
Thanks.
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erik leeman
Posts: 144
Location: Netherlands
Registered: 24 Aug 2007
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 13:53 GMT
updated: 7 Sep 2010 at 13:54 GMT
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David Tan said: 180 rectilinear panoramic photography
????
That's an interesting concept, please tell us more!
(I hope it's not in that good old 360x360 category, but I somehow fear it is)
Erik
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David Tan
Posts: 155
Location: Kualalumpur, Malaysia
Registered: 31 Mar 2010
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 14:12 GMT
updated: 7 Sep 2010 at 14:13 GMT
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My goal is to produce very sharp 180 degrees panoramic photography with little or no distortion such as these:
So, it's not 360, but only 180 degrees because the distortion in 360 degrees is way too much.
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Doug Aurand
Posts: 3282
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 14:12 GMT
updated: 7 Sep 2010 at 14:15 GMT
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Erik
This image was 180° wide according to PTGui before I cropped some of it off
David was asking about "straightening" and printing panoramic images in a thread that's still active:
Is it possible to straighten Panorama Photo?
Maybe you could offer something contructive with your experience with wall size prints
Doug Aurand
Albuquerque, NM
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Tim Eastman
Posts: 126
Location:
Registered: 13 Nov 2006
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 14:20 GMT
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PT Assembler may be useful for your purposes regardless of lens choice.
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erik leeman
Posts: 144
Location: Netherlands
Registered: 24 Aug 2007
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 14:24 GMT
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Those are NOT rectilinear projections, and never can be.
Acceptable rectilinear projection (for 'flat' images) stops at about 120 degrees horizontal FoV.
If you want more than that you could use Panini, or Vedutismo projection, but that is not rectilinear.
Quote from
www.ptgui.com/man/projections.html
"Vedutismo
Named after an 18th century painting genre, this projection preserves all diagonal straight lines through the center of the panorama. It is most suitable for scenes with a clear 'vanishing point'...snip... Any straight lines not through the center point of the panorama will become curved."
Erik
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Doug Aurand
Posts: 3282
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 14:34 GMT
updated: 7 Sep 2010 at 14:40 GMT
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David
You're aways going to get "distortion" or warp as a result of stitching
The best example I can describe is a 3 shot capture for something like a 180° wide rectilinear image
Shooting from left to right, the fist shot is 45° left, the second (middle shot) is 0° and the third shot is 45° right
If you are shooting across a street, it runs horizontal in the second "middle shot", in the first shot its tilted up (running left to right) and in the 3 shot its tilted down (L to R).
For a stitching program to connect the street is has to curve from 45° up to level to 45° down
The amount of warp depends on the total Horizontal FOV, not the lens used.
Sharpness would depend more on the quality of the lens.
Hope that helps
Doug Aurand
Albuquerque, NM
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bigwade
Posts: 821
Location: Utrecht, Netherlands
Registered: 19 Oct 2005
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Ken Warner
Posts: 821
Location: Mammoth Lakes, United States
Registered: 14 Aug 2004
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 17:37 GMT
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David Tan said: My goal is to produce very sharp 180 degrees panoramic photography with little or no distortion such as these:
So, it's not 360, but only 180 degrees because the distortion in 360 degrees is way too much.
Arrgghhhh! Chilling flashbacks to my programmer days. Cubicles ARRRGGHHH CUBICLES!!!!!
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Hans Nyberg
Posts: 2760
Location: Denmark
Registered: 28 Aug 2005
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Hans Nyberg
Posts: 2760
Location: Denmark
Registered: 28 Aug 2005
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Re: 180 Panoramic Photography: Rectilinear vs. Wide Angle Lens
Posted: 7 Sep 2010 at 22:30 GMT
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erik leeman said: Those are NOT rectilinear projections, and never can be.Acceptable rectilinear projection (for 'flat' images) stops at about 120 degrees horizontal FoV.
If you want more than that you could use Panini, or Vedutismo projection, but that is not rectilinear.
Quote from
www.ptgui.com/man/projections.html
"Vedutismo
Named after an 18th century painting genre, this projection preserves all diagonal straight lines through the center of the panorama. It is most suitable for scenes with a clear 'vanishing point'...snip... Any straight lines not through the center point of the panorama will become curved."
Erik
The Panini projection can be quite useful but you have to know how it works already when you take the images.
I use it for some of my tourist clients,
Here are a couple of examples.
www.panoramas.dk/panorama/panini/vedutismo.html
Hans
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