Amazing 6 MONTH Pinhole Exposure !

There was really no way to meter that exposure, due to "reciprocity failure" and the fact that the exposed image was probably not too stable. Paper doesn't have to "hold" the exposed image more than a few minutes before it gets developed, unlike film which might sit around for weeks or months before being processed. I guess that it was in his favor that he used a very slow capture medium, choosing photographic paper rather than film.

For those unfamiliar with the concept of reciprocity failure it means that at very short or long exposures you have to give more exposure. We all know that 1/250 second at f/1 is the same exposure as 1/15 at f/4 is the same as 1 second at f/16 or 4 seconds at f/32, right? But your 4 second negative might be a bit on the thin side, and often even the 1 second exposure will be. An indicated 1 minute exposure might be a stop or more underexposed and when you get up into hours of exposure, oh WOW. You don't calculate, you experiment. Long exposures tend to increase contrast. With color film the three different layers probably react differently from one another, resulting in some unexpected color shifts as well.

It is an interesting image though, different than star trails circling the north star that's been done so many times before.
 
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Isn't there another long exposure artist who did the images over a similar period of months (and years). He documented the construction of the new MOMA, I thought. Using a coated metal as the photographic medium.

Or am I making that up?
 
I bow in amazement. Photography still lives on. You would need a very powerful battery to power up a digital camera exposure for six months, wouldn't you?
 
This technique uses the principle of auto-development, where the image is formed directly by the action of the photons on the emulsion, no chemical development. I've heard some folks have had good luck fixing the image afterwards, while others claim the negative has to be stored in the dark, as they don't fix well without fading the image.

~Joe
 
Eric Renner's pinhole book has several of these multiple-month exposures in it and some that were dug into 6 foot wide holes in the ground as well. All b/w though, iirc. Kinda cool to see one in color :)
 
I don't think this is a six month exposure.

It seems to be multiple exposures over a six month time period. Say, perhaps, one all-day exposure every week for six months.

Very impressive indeed. I wonder if there are any similar elsewhere?
 
That shot with its pinhole moodiness, certainly has its charm. I believe this type of shot was first done (at least in modern times) by Dennis DiChico of Sky and Telescope in the late '70s. A poster size print is still available from that magazine. This is a one year time-lapse photo of the sun showing the analemma of the sun's way, something that was previously only seen as a drawing of the equation of time on old globes.

http://www.sundials.org/links/local/pages/dicicco.jpg

You can find out more about analemma photos here: http://www.analemma.de/english/analem.html

/T
 
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http://www.solargraphy.com/

Yes it can very well be (and probably is) a 6 month exposure. The technique is called "solarigraphy" or "solargraphy". It is a technique where you expose (usually) a b&w paper to a lot of light, often with a pinhole camera or such.

It will develop some colours in it without a developer or any darkroom process. The paper cannot be developed because it would end up completely dark, also if it is fixed, the paper will end up white, so you have to scan it or something.

Some of you, who print b&w in darkroom, might have noticed that undeveloped paper turns pink or cyan when exposed to room lightning. This is the same phenomenom, but used in a different way...
 
six months exposures

six months exposures

Al Kaplan said:
There was really no way to meter that exposure, due to "reciprocity failure" and the fact that the exposed image was probably not too stable. Paper doesn't have to "hold" the exposed image more than a few minutes before it gets developed, unlike film which might sit around for weeks or months before being processed. I guess that it was in his favor that he used a very slow capture medium, choosing photographic paper rather than film.

For those unfamiliar with the concept of reciprocity failure it means that at very short or long exposures you have to give more exposure. We all know that 1/250 second at f/1 is the same exposure as 1/15 at f/4 is the same as 1 second at f/16 or 4 seconds at f/32, right? But your 4 second negative might be a bit on the thin side, and often even the 1 second exposure will be. An indicated 1 minute exposure might be a stop or more underexposed and when you get up into hours of exposure, oh WOW. You don't calculate, you experiment. Long exposures tend to increase contrast. With color film the three different layers probably react differently from one another, resulting in some unexpected color shifts as well.

It is an interesting image though, different than star trails circling the north star that's been done so many times before.
Click to expand...

hi, here you can find more info about solargraphy

http://www.solarigrafia.com
http://free.art.pl/solaris/solaris/Solaris.html
http://www.peuta.republika.pl/kula/kula.htm

much sun
 
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