How do you make the biggest digital photograph in the world? With a lot of photos and computing power.
The picture was made with the Canon 5D mark II and a 400mm-lens. It consists of 1,665 full format pictures with 21.4 megapixel, which was recorded by a photo-robot in 172 minutes. The converting of 102 GB raw data by a computer with a main memory cache of 48 GB and 16 processors took 94 hours. With a resolution of 297.500 x 87.500 pixel (26 gigapixel) the picture is the largest in the world.
See how it was done in this video.
More information is available at http://www.dresden-26-gigapixels.com/.