Entertaining yet Intricate Panography:

How two composite Spherical Panoramas were made from single rows of images

with two different (zoom) lenses, each in one go and with up to five different focal lengths!

 

 

There is usually no need to stitch a panorama from individual images that are shot with lenses of different focal lengths. The reader should then consider that such a case study is a challenge and an exercise that may show how different lens focalsl are viewed in the single complex panorama output. However here was a rare exception when I had to use 2 differents lenses alltogether. The new Canon zoom lens would have been sufficient for performing this renowned photographic feat but it was not yet available at the time (.

The present new page is an update of the original exercise: new fresh photographs were shot at the very same place (five years later) with the same lens but with a newer and more capable camera (an EOS 5D Mark 2 replaced the EOS 5D). Whereas a new Canon 8-15 mm f4L zoom lens wasalso used to make the same panorama for comparison purpose.

PTGui Pro 9.1.3 and AutoPano Giga 2.6.2 RC3: new features of the current issues of these two leading stitching software have been used including the nadir ViewPoint correction. Note: PTGui supports ViewPoint correction on a single image (e.g. a Nadir shot) mixed with standard NPP centered shots while AFAIK AutoPano Giga doesn't.

 

With Tokina 10-17 mm Fisheye Zoom Lens:

You may download the images files (8 MB Zip). Respective project files for APG and PTGui are also available.

Five portrait shots in an horizontal plane, 90 degrees apart from the next + one oblique shot of the Nadir with a Canon EOS 5D Mk2 (ISO 100)

 

4 + 1 Source Images

---->

 
Lens Settings
17 mm @ f/8
12.5 mm @ f/8
14.5 mm @ f/8
10 mm @ f/8
 
17 mm @ f/8
PTGui Pro Optimization Results
Fullframe

(H)FOV 84 deg

 

Circular FOV 193 deg
Full-frame

(H)FOV 95 deg

 

Circular FOV 193 deg
 
Full-frame

(H)FOV 107 deg

 

Focal estimated by PTGui Pro
~16.49 mm
~10.14 mm
~14.97 mm
~10.12 mm
 
~15 mm
AutoPano Giga Optimization Results
Circular FOV 157 deg
Circular FOV 194 deg
Circular FOV 182 deg
Circular FOV 190 deg
 
N/A
Focal estimated by APG
15.74 mm
10.37 mm
13.61 mm
9.07 mm
 
N/A

Five photographs were obtained each by processing seven (7 x 1-EV) bracketted shots through EnfuseGUI. They had been respectively shot at 10 mm, 12.5 mm, 14.5 mm and 17 mm of focal length on a tripod fitted on top with home-built panorama head. No other setting modification between each image have been done.

The fifth image (intended to be ViewPoint corrected) was taken after shifting laterally the tripod by about 1.3 meters. Manual exposure mode. Triggering with wired remote.

The RAW files were processed with ACR CS4 (JPEG): chromatic aberration was identically removed or reduced on all 35 images but no vignetting correction was applied at this stage.

 

With Canon 8-15 mm Fisheye Zoom Lens:

You may download the images files (10 MB Zip). Respective project files for APG and PTGui can also be downloaded.

Five portrait shots in an horizontal plane, 90 degrees apart from the next + one oblique shot of the Nadir with a Canon EOS 5D Mk2 (ISO 100)

 

4 + 1 Source Images

---->

 
Lens Settings
15 mm @ f/8
11 mm @ f/8
13 mm @ f/8
8 mm @ f/8
 
15 mm @ f/8
PTGui Pro Optimization Results
Full frame

(H)FOV 91 deg

 

Circular FOV 187 deg

Circular FOV 193 deg

Circular FOV 181 deg
 
Full-frame

(H)FOV 91 deg

 

Focal estimated by PTGui Pro

~15.5 mm

~12.35 mm
~12.6 mm
~12.6 mm
 
~15.5 mm
AutoPano Giga Optimization Results
Circular FOV 157 deg
Circular FOV 194 deg
Circular FOV 182 deg
Circular FOV 190 deg
 
N/A
Focal estimated by APG
13.7 mm
8.6 mm
12.8 mm
7.3 mm
 
N/A

Five photographs were obtained each by processing seven (7 x 1-EV) bracketed shots through EnfuseGUI. They had been respectively shot at 10 mm, 12.5 mm, 14.5 mm and 17 mm of focal length on a tripod fitted on top with home-built panorama head. No other setting modification between each image have been done.

The fifth image (intended to be ViewPoint corrected) was taken after shifting laterally the tripod by about 1.3 meters. Manual exposure mode. Triggering with wired remote.

The RAW files were processed with ACR CS4 (JPEG): chromatic aberration was identically removed or reduced on all 35 images but no vignetting correction was applied at this stage.

 

Michel Thoby

22 February, 2012