Multiple Exposures Of The Sun

Stormbringer_X1 writes "This image holds many first. Called an analemma (a figure 8 loop), it is a multiple exposure of the sun, where one observes the sun at the same time of day, over the period of a year. The patience and dedication to pull this off are emphasized by the fact that there are so few in existence (7 total including the first in 1979). It is the first analemma imaged in a single calendar year, the first on the southern meridian, and the first in Greece. The author has other images from 2002 that will be available soon. So stay tuned. Here is an image from NASA archives"

Comments

It's not an easy thing to do

[smartin]

My neighbour did one of these several years ago. It is here.
It took him a year to do and required a lot of engineering including:

• Fixing the film in his camera and hacking it to do multiple exposures.
  
• Using the right filter to black out every thing but the sun. The last exposure was taken without the filter.
  
• Fixing the camera to the rad in his office.
  
• Locking the cleaning staff out of his office for the entire year.
  
• Figuring out where and when to take the picture so that the sun will not be obscured by a building at the target time.
  
• Arranging to be free to take a picture at the same time of day every two weeks for a year.
  
• Dealing with days that were cloudy.
  

It is a facinating project and there have never been that many of these taken. The building in the picture is Bell Labs by the way.