Astronomy, Photography and Weather

General Category => Astronomy & Space => Topic started by: Conor McDonald on March 26, 2011, 10:36:32 pm

Title: Extreme Photography
Post by: Conor McDonald on March 26, 2011, 10:36:32 pm
Photography’s Longest Exposure

Six months. This dream-like picture shows each phase of the sun over Bristol’s Clifton Suspension Bridge taken during half a year. The image was captured on a pin-hole camera made from an empty soda can with a 0.25mm aperture and a single sheet of photographic paper. Photographer Justin Quinnell strapped the camera to a telephone pole overlooking the Gorge, where it was left between December 19, 2007 and June 21, 2008—the Winter and Summer solstices. (That’s a 15,552,000 second exposure.) ‘Solargraph’ shows six months of the sun’s luminescent trails and its subtle change of course caused by the earth’s movement in orbit. The lowest arc being the first day of exposure on the Winter solstice, while the top curves were captured mid-Summer. (Dotted lines of light are the result of overcast days when the sun struggled to penetrate the cloud.) Quinnell, a renowned pin-hole camera artist, says the photograph took on a personal resonance after his father passed away on April 13—halfway through the exposure. He says the picture allows him to pinpoint the exact location of the sun in the sky at the moment of his father passing.


Title: Re: Extreme Photography
Post by: markt on March 28, 2011, 01:49:45 pm
Great stuff Connor!  Have been doing some 'Solargraphy' with my GCSE Astronomy pupils - we're still 'exposing', will get the results up when we are done.  We're involved with this project with it...  There's some helpful hints on here as to how to make the pinhole camera.  If anyone is interested I bought a huge job lot of photgraphic paper to do this, if you want some drop me a pm and i'll get some out to you, there's more than enough to share around!...  ::)

Title: Re: Extreme Photography
Post by: Roman White on June 23, 2011, 07:54:00 am
That is something very original. I would never get an idea to do a 15 million seconds exposure.  :)