Re: Travel kit for camera obscura experiments

Google :"Abelardo Morell ", (not sure of the spelling of his name )and see what he has done with using a room as a camera .he then photographs the exposures against the opposing wall ?"ie a camera with in a camera, with reallyyyyyyyyyyy long exposures ,I mean hours ......something like 8 hrs or more..Just for fun,after learning of Morell,?I once made a room dark with black plastic and tape, and guessed at the aperture needed relative to the room size( had to keep it simple , and was also curious), so I used "coins " ie pennies , nickels , dimes , quarters as my model for aperture sizes, was out for just plain fun, to see "what if a /"shot in the dark," if you will....am sure someone /many on this list can give you "exact aperture " figures ,just have fun, and play /experiment is my motto "If it aint fun, it isnt worth doing ".....

-----Original Message-----
From: Ed Nazarko <ednaz@attglobal.net>
To: pinhole-discussion@spitbite.org
Sent: Tue, 4 Sep 2007 6:49 pm
Subject: [pinhole-discussion] Travel kit for camera obscura experiments

My "main life" is at the moment overwhelming the part of my life that I enjoy - photography and pinholing. (I am 1/3 of the way through building a panoramic pinhole camera, and holding for the last two months...) I'm trying to think of ways to productively and enjoyably use the hour or two that I often get in the evening (or early morning) in some strange hotel room in some awful industrial campus area.?
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Besides black plastic and gaffer tape for blacking out the windows (let's see what Homeland Security makes of that...) what else should I carry to allow me to experiment a bit with camera obscura work? Besides, of course, a camera to record the results, I always have a digital SLR and a few lenses everywhere I go.?
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I have to admit I'm completely unfamiliar with even the most basic concepts of giant pinholes or camera obscura. For the average size hotel (or suburban motel) room, what in general would be a reasonable size aperture? I figure I could make up a few with nice clean sharp edges and slip them in the back of my suitcase. Are we talking about apertures measured in fractions of inches, or inches??
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How about the concept of creating a camera obscura with a pinhole sieve? ? If I make a few sieve images on transparency film, what are some rough guesses as to size of the central area, size of the sieve holes, and overall size? I love the sharp/glow look of pinhole sieve images.?
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I'm terrified that a few of you will generate some elaborately precise equations that will shame me (I do large economic models by day, but still struggle with pinhole math, go figure.) Since I have three to four evenings and mornings a week in hotel rooms I can afford to experiment a bit. A few "try this diameter" messages will help me more than formulae - other than my main life, I'm fairly math-phobic.?
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Thanks.?
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Ed?
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Received on Tue Sep 4 17:04:50 2007