28 days

[xoxoxoBruce]

Bravo, fill us in on the equipment.

[footfootfoot]

Originally Posted by xoxoxoBruce

Bravo, fill us in on the equipment.

HAHAHAHAHA!
Are you all sitting down?
The "camera" is a one quart paint can (unused) with a .040" hole drilled in one side as a pinhole. The hole is a little too big, so the image is a bit blurrier than I'd like. I'd like to find a 1/64 bit or a pal with a laser cutter...

The image is formed on "printing out paper" which is a gelatin silver paper that was common in the early days of photography. It has an excess of silver chloride and so it "prints out" from exposure to strong UV sources rather than "developing out" like modern papers. Remember studio proofs that were orange and faded? Same stuff.

The image comes out orange and brown and reversed (negative). I scanned it into p'shop and reversed the values/colors. Hence, orange-->Blue.

It is extremely slow, when used to print from a negative, exposures can range from several minutes to hours in bright sun. In the pinhole camera a one month exposure for the landscape was barely adequate.

Each day records a different arc. I've got a dozen of these and I am thinking of setting them up all over town. I'll post the images next month. I'm going to check the almanac to see when we get the best separation between the days arcs.

Originally, I thought about doing a solstice to solstice or equinox to equinox image, but I realized things might get clotted.

The wide angle effect is from the curve of the paint can.

[xoxoxoBruce]

Originally Posted by footfootfoot

HAHAHAHAHA!
I've got a dozen of these and I am thinking of setting them up all over town. I'll post the images next month.

Do you think they'll let you post from Guantanamo Bay? Be careful, we don't need an orange alert.

[footfootfoot]

Originally Posted by xoxoxoBruce

Do you think they'll let you post from Guantanamo Bay? Be careful, we don't need an orange alert.

I've never seen that paint can before in my life. I don't know what you're talking about.



Billy,
It's the sun making its way across the sky, 28 times.

[hampor]

The biggest change in day-to-day position of the sun is around the equinox. The days are getting longer by twice as much now as they did at the beginning of January.

So to get the biggest change from one day to the next, do it in March.

It might also be interesting to do a run that ends at the equinox. I wonder if you would be able to see the difference increasing as it "accelerates".

[footfootfoot]

Originally Posted by hampor

The biggest change in day-to-day position of the sun is around the equinox. The days are getting longer by twice as much now as they did at the beginning of January.

So to get the biggest change from one day to the next, do it in March.

It might also be interesting to do a run that ends at the equinox. I wonder if you would be able to see the difference increasing as it "accelerates".

I'll do that. luckily these are fast, cheap, and out of control.
Well, they aren't really all that fast.

Thanks for the tip.

Want a camera?

[BigV]

Originally Posted by footfootfoot

HAHAHAHAHA!
Are you all sitting down?
The "camera" is a one quart paint can (unused) with a .040" hole drilled in one side as a pinhole. The hole is a little too big, so the image is a bit blurrier than I'd like. I'd like to find a 1/64 bit or a pal with a laser cutter...
--snip--

hey 3ft...

what about cutting a larger hole, say quarter sized, dime whatever, then covering that larger hole with some opaque material that is softer, like electrician's tape. then poking your hole in the tape with something smaller, like a needle. then you could make more than one try, you know, do-overs if it was not satisfactory. you could easily control the piercing with the softer material.

another idea. if you divided the can with a partition and made two separate image areas, could you do a stereoscopic pair of images? maybe just two cans lashed together.

I do like your images, they are very artistic. I would like to try this myself. at almost 48 deg lat we get considerable movement of the sun in the sky south to north in the springtime.

[footfootfoot]

Originally Posted by BigV

hey 3ft...

what about cutting a larger hole, say quarter sized, dime whatever, then covering that larger hole with some opaque material that is softer, like electrician's tape. then poking your hole in the tape with something smaller, like a needle. then you could make more than one try, you know, do-overs if it was not satisfactory. you could easily control the piercing with the softer material.

Actually, I am lazy. And yes, a variation of this is to use aluminum can material. There is a pinhole website where you can find the decimal inch diameter of sewing needles which are numbered.

Originally Posted by BigV

another idea. if you divided the can with a partition and made two separate image areas, could you do a stereoscopic pair of images? maybe just two cans lashed together.

Yes! I like that. I have a headache already from just picturing what that may look like. I have an old stereo viewer. I will have to make one, despite my lazyness.

Originally Posted by BigV

I do like your images, they are very artistic. I would like to try this myself. at almost 48 deg lat we get considerable movement of the sun in the sky south to north in the springtime.

Thanks! If you want a paint can, let me know. Or if you can make your own can, I'll send you some of the paper. Or you can follow the link to CAW.