Carlos Galindo's List: Fotografía

Para mi curso de fotografía

Pendulum drawing\nInstead of holding the penlight as you do when light writing, try suspending it from the ceiling and giving it a push. It will swing like a pendulum, drawing whirling designs for you. The result is called a physiogram or pendulum drawing.\n \nHere's the setup: Your camera goes on a table with the lens facing the ceiling. Tie or tape a cord to the penlight and hang it from a ceiling fixture so the bulb is four or five feet above the lens. With the light at that distance, you'll be able to swing the light within a three-foot width, and a 50mm-or-wider focal length will keep the light within the field of view of the lens.\n\nManually set the focus by measuring the distance from the film (or sensor) plane to the bulb. Turn off the room lights and wait several minutes until your eyes get accustomed to the dark so you can make sure no stray light is creeping under the door or through the windows. When everything is ready, turn off the room light, start the "light pendulum" in motion, and begin the exposure.\n\nYou'll need about a 20- or 30-second exposure at f/16 on ISO 200 film. This f-stop is an approximation since it depends on your particular setup, especially the brightness of the bulb. It's a good idea to shoot some tests at several different apertures.\n \nHere are several pendulum variations worth trying. After several seconds, push the pendulum in a different direction and you'll create a combination of patterns by (see sample above). Lay a colored filter over the lens to color the light, perhaps changing colors when you change the light's direction. Or put a special-effects filters, such as a diffraction grating filter, over the lens.\n\n\nAll strung up\nJust for fun, wind strands of Christmas tree lights around an obliging friend. Turn off the room lights and shoot a one-second exposure. Encourage your friend to move a bit during the exposure so you'll get some colorful streaks, especially if she raises her arms.\nHere's a great idea to try when you're a passenger in a car at night. Set the

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