Canon EOS-1 - Manual (Page 20)

Versatile exposure control and blazingly fast
Autnmatit exposure
A complete selection of AE
choices provides the kind of operat­
ing flexibility you need for the
variety of work you do.
■ Shutter-priority AE
Shutter speeds can be set in
1/3-step increments, ranging from
30 seconds to 1/8000 second.
Custom Function No. 6 enables
settings in l-step increments.
■ Aperture-priority AE
As with shutter speeds, aperture
values can be set in 1/3-step incre­
ments that are adjustable to 1-step by
Custom Function No. 6.
■ Depth-of-Field AE
Using this mode makes it easy to
control exactly how much of the
scene will be in sharp focus from
front to back. You simply focus on
the element nearest you that is to be
sharply in focus, then to the element
farthest away that you want in focus.
The camera automatically selects the
correct AF distance (about 7:10 of
the distance between nearest point
and farthest), the aperture required
to keep everything between the two
points in focus, and the equivalent
shutter speed for lighting conditions.
Depth of field can be confirmed by
pressing the electronic preview
button. This mode is also useful
when extremely shallow depth of
field is required, since you can set the
nearest-point/farthest-point peri­
meters at the same place.
■ Intelligent Program AE
This convenient mode calculates
both shutter speed and aperture
value by taking into consideration
the focal length of the lens being
used, which is input automatically to
the main microprocessor from the
lens microprocessor as soon as the
lens is installed. Intelligent program
AE thus automatically calculates the
minimum possible shutter speed for
the lens, providing reasonable pro­
tection against camera-shake. With
zoom lenses, information is trans­
ferred simultaneously for any focal
length selected, and the program is
adjusted to match that focal length.
Program shift is possible in 1 EV
steps, used with auto exposure
bracketing, you have the best in
convenience and security for fast­
breaking situations.
/ /ItdOO Sic. shutter speed
EXPOSURE SYSTEMS