Current webmaster: Shamim Pakzad (shamimp@ce.berkeley.edu).
CS 39J: The Art and Science of Photography is a freshman seminar taught
by Professor Brian A.
Barsky.
Site design by Steven Chan.
| CS 39J > Schedule & Notes > Session 5 Detailed Notes |
http://inst.eecs.berkeley.edu/~cs39j/fa04/session05.html
1 October 2004
Parallax
•Parallax is defined as the apparent displacement of an object as seen
from two different points not on a straight line with the object.
•To utilize the parallax effect when one object is close and the other
is far, you can shift your viewpoint laterally. This controls where the objects
line up in your photograph, causing the relative position in the plane of the
image to shift.
•Parallax is useful for adjusting the composition of your image.
Depth of Field
•Think of depth of field as a volume of focus that you shift back on forth
depending on where you focus your camera. Higher f-stop numbers (smaller aperture
openings) create an increased volume of focus – an increased depth of
field, whereas smaller f-stop numbers create a narrower volume around your point
of focus.
•Cameras used to have a Depth of Field Preview button, where it would
stop down the aperture to where it was set, so you could see what would be in
focus and what wouldn’t.
Creating a Natural
Fill Flash Effect at Sunrise/Sunset
•When photographing at sunrise or sunset and you want to illuminate foreground
objects with a flash, try putting red plastic or cellophane over the flash,
which will give it a red glow, making it look like the natural light of the
sun, rather than a white flash.
•Bracket a couple times when you do this, b/c it will diminish the amount
of light coming from the flash just a bit and you may have to compensate with
shutter speed or f-stop.
Pay attention to
framing/composition
•Try not to place the horizon in the center of your frame, because it
looks too balanced. Having the horizon in the bottom half of the page or the
top half is much more visually interesting.
•Crop out large black areas, so that only the interesting parts of your
photographs are included. This will increase their effect and create a more
focused, dramatic image, rather than detracting from your image with blank or
uninteresting/mediocre areas.
Second Assignment
•Take pictures with a focus on “colors”, either vivid or dull
colors. The asignment is due this Wednesday October 6th, 4:00pm. Please email
a pointer to your photos.
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