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First class: June 23, 2008, 6-8 PM
PowerPoint presentation for this class
1. Information (Write this on the back of your card.)
Course website: http://hiviz.com/mwit/
Teacher's email: winters@ncssm.edu
2. Please do this for Tuesday or Wednesday: Send me an email message. Tell me something about yourself and why you want to take this course. Attach a photo of yourself if you have one.
3. You'll be doing high-speed flash photography in this course. We call it high-speed because we observe things moving at high speed, of course! But we make the objects look like they’re stopped. We use a very short flash of light to make fast-moving objects appear frozen in time. We can do this with simple equipment: flash, camera, trigger. You’ll build some of the triggers.
4. Links to photos taken by other high-school students
A website with many student projects: http://courses.ncssm.edu/hsi/index.htm
5. Answering a question with high-speed imaging: How long does it take a balloon to burst?
6. For the last demonstration, you used your eyes and brains to record images of bursting balloons. Of course, you can also take photographs. For high-speed flash photography, we use the open shutter technique. We would turn out the room lights, open the camera shutter, pop the balloon, close the shutter, and turn the lights back on. The action is stopped by the flash; not the camera.
7. How is flash used to stop the action?
The flash must be triggered automatically, because humans are too slow.
8. How do you make the batteries in your flash unit last as long as possible?
Turn off the flash when you’re finished using it.
Don't play around with the flash by doing things like flashing it in other people's eyes.
Use the flash on an automatic setting.
Don't cover the light sensor on the front of the flash. (Note that the Vivitar 283s don’t have a sensor on the front, but you have to be sure to keep the wire in place.)
9. Here’s how to set your flash unit on automatic:
Nikon SB-16: Set it on the brown dot.
National PE-3057: Set it on the yellow square
Panasonic PE-28S: Set in on AUTO (not AUTO with flower)
Vivitar 283 (we have 2 of these): Turn the dial on the front to yellow
Nikon SB800: For Mode, select A. For F number, select F2. (This should already have been done.) Note that this flash automatically goes into Standby in order to save batteries. In order to wake up the flash, press the FLASH button.
10. How do you make a flash unit flash?