Synchronized Cameras - Canon Camera Hackers Manual

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C H A P T E R 7
This image was composed of 2 x 5
images. Focus stacking was performed
with CombineZP; the resulting images
were then composed into an anaglyph
with the help of StereoPhotoMaker. The
nearest point to the subject matter
was approximately 27 cm, and a
camera spacing of approximately
15 mm was used, a bit more than what
was required. Although the foreground
is not completely sharp (some more
images would have been needed for a
larger depth of field), the resulting 3D
impression is very strong when viewed
with red/cyan goggles (a color version
for viewing is found on the book web
site at www.photozora.org/cchm/)«.
Canon Digital Elph SD1100 IS, 38 mm,
f/2.8, 1/100sec, ISO 400.
The Stereo Data Maker (SDM)
under Bracketing type the number of images that should go into one focus
stack. Then return from the <Alt> mode and set your camera's shooting
mode to Continuous. Shoot the required number of images, shift the cam-
era, and shoot the next series.
When composing the image, first perform the focus stacking for the
left and the right images separately. The two resulting images are then
combined with the StereoPhotoMaker.
Figure 7-10

7.7.4 Synchronized cameras

After you whet your appetite by taking stereo images with a single camera,
you might want to consider acquiring a second camera. Your best option is
to buy a camera of the same type (it's always good to have a backup). The
advantage is that taking stereo photos with two cameras is much more
convenient than with a single camera, and you can take stereo images of
moving objects, too. The SDM can synchronize two cameras down to
1/16,000 of a second, so your subjects can move very fast indeed.
Triggering
Synchronization can only be achieved by triggering both cameras at the
same millisecond. Special remote controls are required. If you are happy
with the simple remote control presented in section 4.9.2, you can easily
solder a second mini- USB plug to the first one. This will do the trick.