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Re: Re: Pin hole cameras
[ Thread ][ Subject ][ Author ][ Date ]Diane Gronas
Mon, 16 Mar 1998 00:48:54 -0800 (PST)
I just completed writting a lesson plan on the pinhole camera
to turn in tomorrow, but still have some questions.
What is an average EXPOSURE TIME for a 3 lb. coffee can?????
(I listed the oatmeal box as the container to make the camera
from. I didn't know of an easy way to CUT A HOLE in the coffee
can.) With about a one inch hole cut in the side a piece of
heavy duty aluminum or thin sheet of copper could be placed over
the opening through which a small hole is made. (I'm assuming the
size that a fine sharp needle would make since I have found no
specific info. as of yet. Someone suggested sanding the copper
after the hole was made to remove burrs or improve the roundness
of the small aperture. (I'll try sending questions through E-mail)
What I did discover was A wonderful vocabulary that relates to
art composition in general and how the history of the camera
obscura relates to the Renaissance mathmatical calculations of
perspective and its expantion into the more scientice realm of
physics and chemistry. In this way I found "Photography, A Handbook
of History, Materials, and Processes", by Charles Swedlund 1973..
to be very helpful. Emphsising the seeing of tonal values is a
great into. into drawing discriptive form and drawing negative space.
For an introduction to photo history the students could present short
skits on the early stories: The Arab seeing the vision in his tent;
Leonardo da Vinci calculating and explaining the camera obscura to a
class; Horses dragging the huge 8' camera to a sight???; Renaissance
artists using it to create realism (and perhaps denying it use and
hidding the smaller 2' version); Danielo Barbaro of Padua going
bannanas because he discovered the lens made the consintration of
light much brighter and "He could see!" it was all so clear now;
and old Heinrich Schulze at the age of 40 discovering it wasn't the
heat of the sun that caused the silver salts to darken. (How did he
heat them up in a skillet in the dark???). Adding comedy to history
may distort the truth of what really happened too much
(Do you think???), but add some costumes and illustrations of Arabs,
da Vinci, & Renaissance art and the kids could really have a
memerable experience that might really excite them about
photography. Any opinions? Please excuse misspellings...it's late.
Please send details on the process I'm still researching!