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 Post subject: 6-month exposure
PostPosted: Sun Jun 20, 2010 7:24 pm 
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Here is a beer can pinhole camera image of my southern horizon showing the path of the Sun. This is a 6-month exposure time (solstice to solstice).

Image

Greg

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http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject:
PostPosted: Sun Jun 20, 2010 8:30 pm 
I'm normally floored by your images, but this one definitely not as stunning as your usual contributions.

However, it is still interesting :) How was the photo done? Was it a timelapse or was it just a single 6 month exposure? If it was a 6 month exposure, how did you prevent it from blowing out?


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PostPosted: Sun Jun 20, 2010 9:14 pm 
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The resolution and depth is not quite up to the standard of my 6 megapixel astronomical CCD :D

This is taken using a beer can pinhole camera mounted to the south facing wall of my house and this is a continuous 6-month exposure (from solstice to solstice). You can see the white fibreglass dome of the New Forest Observatory in the middle, and the checkerboard pattern running across the centre is the patio. In the centre of the patio you might just make out a table and chairs.

Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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PostPosted: Mon Jun 21, 2010 4:16 am 
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I like this project of yours and although the quality is not very high it`s still interesting to watch the suns trail change.

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 Post subject:
PostPosted: Mon Jun 21, 2010 5:39 am 
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Interesting shot, reminds me of a spaceship.

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PostPosted: Mon Jun 21, 2010 8:56 pm 
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Technically very impressive and interesting - thanks Greg!


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 Post subject:
PostPosted: Wed Jun 23, 2010 1:47 pm 
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Cheers Gordon,

It is difficult leaving these cameras alone for 6-months at a time - very tempting after a couple of months to open them up and see what's happening.

Still - I re-loaded the two beer cans with film and set them going again - this time pointing a bit further up so I should get the Sun at its highest point in the sky. Only 6-months to wait now - roll on December 21st :)

All the best,
Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject:
PostPosted: Wed Jun 23, 2010 4:29 pm 
A very creative and interesting idea you carried out Greg :) Still I find the cropping a little annoying ... is it a choice or a limitation?


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 Post subject:
PostPosted: Wed Jun 23, 2010 5:32 pm 
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Wasn't cropped - this was due to me not having the beer can angled enough upwards to capture the Sun at its highest point :( As you say it is VERY annoying to wait 6-months to find out you didn't set the camera up right. BUT - I have just reloaded the 2 beer cans with new film - AND - I angled them up high enough (I hope) to catch the Sun at the top of its travels. So now it's another 6-month wait until December 21st 2010 :D :D

Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject:
PostPosted: Wed Jun 23, 2010 5:41 pm 
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Need a wider angle pinhole? :)

Definitely interesting. I assume that was B&W film - would colour work too?

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 Post subject:
PostPosted: Wed Jun 23, 2010 7:28 pm 
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It was black and white photographic paper - film is too sensitive for this work.

Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject:
PostPosted: Wed Jun 23, 2010 7:34 pm 
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I absolutely love it.. both the concept and the final image... it's something that would make a very cool pic to frame and hang... at least I would :D really a cool conversation piece for me.

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 Post subject:
PostPosted: Wed Jun 23, 2010 9:35 pm 
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When I do the thing properly - that is get the whole 6-months of Sun tracks on the film I will indeed hang it on the wall :D
Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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 Post subject:
PostPosted: Wed Jun 23, 2010 11:41 pm 
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Nice!
Very interesting picture, showing exactly how the sun moves! =)


This guy has done something similar:
http://www.pinholephotography.org/SSGB%20Page.htm

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 Post subject:
PostPosted: Thu Jun 24, 2010 8:40 am 
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Doesn't show exactly how the Sun moves unfortunately as the photographic paper is curved inside a beer can - so those curves are not how the Sun appears to move across the sky.

It's more like this:
Image

Which was taken with another pinhole camera but this time with the photographic paper flat.

Greg

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Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


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