Sun's path June to December (Photo)

[davidcann]

http://helpmyphysics.co.uk/wordpress/?p=276

[nfnaaron]

I was just explaining to my kid how you can tell your latitude from the sun's angle at noon, if you know the day. This picture solidified that idea.

[samratjp]

Such an elegant solution in the day of the never decreasing memory card sizes and megapixels.

[mortenjorck → samratjp]

Yes. I can easily imagine a maximalist-geek solution involving a weatherproofed enclosure, a webcam, a solar array, a wi-fi antenna, and a server script with ImageMagick that exposure-compensates and additively composites each new image for 10 months.

[po]

Wait a minute... how do you scan an undeveloped piece of photographic paper? If you read the instructions it says to put the paper on a scanner in a dark room and just scan away. Doesn't the scanner immediately blow out the image?

http://www.pinholephotography.org/Solargraph%20instructions....

[voidpointer → po]

I was just wondering about the same thing. It's the super-long (over) exposure. See http://www.solargraphy.com/index.php?option=com_content&...

[po → voidpointer]

I don't know... this explanation just opens up a whole new set of questions for me.

"Although there is a piece of black and white photosensitive paper inside the pinhole camera the result will be in colour."

Huh? I think I'm doomed to spend the rest of the evening on wikipedia reading about photo paper chemistry.

[voidpointer]

I'm surprised that he is able to scan the latent image from the exposed photographic paper without developing it. Especially since the scanner will further expose the paper so it would be useless afterwards... Maybe this is just working because the paper gets way overexposed and that will make the latent image actually show without development. Does anybody know what's going on there?

[voidpointer → voidpointer]

Ok, to answer my own question... It is the long exposure time. See http://www.solargraphy.com/index.php?option=com_content&...

[po]

Wow, Google has a lot of good examples: http://www.google.com/images?&q=Solargraph

[die_sekte]

I was expection a metaphor about Sun Microsystems' decline.

[samratjp → die_sekte]

That would be funny. Maybe it'd be The Departed: Gosling Edition

[kenj0418]

Was I the only one expecting the picture to involve Larry Ellison and a wood-chipper?

[zooey]

It seems a futuristic skyscraper behind an old fashion house

[thmz]

This appeared on Makezine last month. And it got me thinking: what would be the best way to do this with a webcam?

pixel = (added pixel value of all frames) / total frames?