Visiting the fun fair Dippemess (reprojected)

This reprojection is based on a panoramic image of the Dippemess in Frankfurt am Main, Germany. The projection is “stereographic down”

Visiting the fun fair Dippemess

Visiting the fun fair Dippemess


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Camera Maker: SONY
Camera Model: DSLR-A700
Exposure Time (sec): 1/125
F-Number: 5.6
Focal Length (mm): 8
Lens: Sigma 8mm/4
ISO: 200

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Reprojection of JPMorgan Chase Corporate Challenge 2008 in Frankfurt am Main

This image is a stereographic reprojection of an old panorama from 2008. I shot the original panorama exactly 6 years ago. And today was this years race of the JPMorgan Chase Corporate Challenge in Frankfurt am Main.

JPMorgan Chase Corporate Challenge 2008 in Frankfurt am Main

JPMorgan Chase Corporate Challenge 2008 in Frankfurt am Main


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Camera Maker: SONY
Camera Model: DSLR-A700
Exposure Time (sec): 1/1250
F-Number: 5.6
Focal Length (mm): 8

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Mariahilf Church Nave

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Camera Maker: SONY
Camera Model: ILCE-7
Exposure Time (sec): 1/30
F-Number: 7,1
Focal Length (mm): 8
Lens: Walimex 8mm/2.8
ISO: 800

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Mounting the Walimex 8mm Fish Eye with the Novoflex ASTAT-NEX

The Novoflex ASTAT-NEX is usually used to mount any of the different Novoflex adapters to a tripod. However the diameter of the ring fits the Walimex 8mm perfectly. The following images illustrate the mounting with the Sony ILCE-7. I only made a small change to the ASTAT-NEX adapter: I removed a little piece using a hand saw to improve the mounting options. With the small part sawed off I can mount the lens both ways round. Both options allow it to change the aperture and the distance on the lens! Dependingon my setup (pole, high pole or table top) I use one or the other option.

I called the first option Reverse in the image series below.

Walimex 8mm on ASTAT-NEX Reverse No Lens

Walimex 8mm on ASTAT-NEX Reverse No Lens

Walimex 8mm on ASTAT-NEX Reverse Front

Walimex 8mm on ASTAT-NEX Reverse Front

Walimex 8mm on ASTAT-NEX Reverse Front Camera

Walimex 8mm on ASTAT-NEX Reverse Front Camera

Walimex 8mm on ASTAT-NEX Reverse Back

Walimex 8mm on ASTAT-NEX Reverse Back

The following images show the normal mounting option you can use when you do not want to saw a small part from your ASTAT-NEX adapter.

Walimex 8mm on ASTAT-NEX No Lens

Walimex 8mm on ASTAT-NEX No Lens

Walimex 8mm on ASTAT-NEX Lens

Walimex 8mm on ASTAT-NEX Lens

Walimex 8mm on ASTAT-NEX Lens Camera

Walimex 8mm on ASTAT-NEX Lens Camera

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Reprojected WWP314 ‘Decade’ – Stereographic Up and Stereographic Down

The WWP event 314 has the theme ‘Decade’. I participated with this submission. The event is scheduled to go online on 1/Apr/2014.

Reprojected WWP314 ‘Decade’ – Stereographic Down

Reprojected WWP314 ‘Decade’ – Stereographic Down

Reprojected WWP314 ‘Decade’ – Stereographic Up

Reprojected WWP314 ‘Decade’ – Stereographic Up

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Comparing a Mercator projection with a Cube Face projection

One of my favorite panoramas I shot recently is the atrium of the Bavarian Ministry of Justice. Why? Because I managed to capture the almost perfect symmetry in the room. See for yourself here or here. I also reprojected the full spherical panorama to the Mercator view you see in the following image.

Atrium of the Bavarian Ministry of Justice - Mercator projection

Atrium of the Bavarian Ministry of Justice – Mercator projection

What I don’t like about this panorama are the curved lines. It came to my mind that a rectilinear reprojection of the image would result in straight lines. However it is also not possible to reproject the full 360° field of view into one single rectilinear image. But it is possible to split the full 360° into 4×90°. The following image is the result of this technique.

Atrium of the Bavarian Ministry of Justice - Cube Face projection

Atrium of the Bavarian Ministry of Justice – Cube Face projection

All the straight lines in the panorama are also straight in the real building. The problem is now you get some discontinuities at border between the four cube faces. This is not a real problem in this panorama as the floor tiles just look fine wih the additional discontinuities.

The following image shows the four cube faces reprojected back onto the equirectangular image. You can see here clearly why the floor tiles are not curved in the final Cube Face Panorama. You can also see that the cube faces are not really cube faces, because I moved the individual cubes faces towards the zenith to see less of the floor and more of the ceiling.

Atrium of the Bavarian Ministry of Justice - Cube Face (Making Of)

Atrium of the Bavarian Ministry of Justice – Cube Face (Making Of)

The following panorama shows the extracted cube faces in an interactive view:

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