Reference Guide

camera because it provides
excellent exposure control for
action photography. This
pattern is selected by using
Custom Function #8.
The meter coupling range at ISO 100
for all patterns except spot is EV
o to 20. In Spot, the sensitivity
is rated at EV 2 to 20.
Extended Shutter Speed Control
The quality of shutter speed
control in a professional SLR is
always of paramount importance.
EOS-1 upholds that importance by
becoming the first camera to offer
discrete increments of 1/3 step
value. In today's world, with
transparency film being the medium
of choice for so many photographic
clients such as magazines and
advertisers, this fine degree of
control will be a most welcome
addition to the pro's creative
arsenal.
With Custom Function #6, the 1/3
step increment can be changed to 1
step. This will be handy for those
who prefer to shoot negative film,
such as newspaper and wire-service
shooters.
The top shutter speed of the EOS-1
is 1/8000 second, a valuable
creative tool with fast films and
faster lenses. Flash Sync is good
up to 1/250, for maximum
performance in fill-flash.
Bulb exposure requires only a
minimal amount of battery power,
making extended time exposures
easy. The EOS-1's LCD displays the
exposure time up to 120 seconds.
Multiple Exposure is easily
accomplished too, with virtually
100% registration accuracy due to
the separation of shutter charging
from film transport. Up to 9
exposures can be preset. This
amount can be extended or cut short
as you choose during operation.
4. SUPERIOR FOCUSING PERFORMANCE IN
AF AND MANUAL.
Since EOS-1 is a professional SLR,
Canon feels that the further
improvement of its Autofocusing
system is a natural evolutionary
step. As a result, the EOS-1
exceeds all other AF SLRs in
focusing speed, accuracy, and
reliability. This is due to the
overall performance of the system
rather than any individual
improvement.
Increased Computational Capacity
Improves Speed and Accuracy.
In previous EOS designs, the
camera's main microcomputer was
called on to provide a multitude of
calculations and control, including
AE as well as AF. However, EOS-1 is
different because it dedicates an
entire CPU to AF processing, and
then adds a second independent chip
set for AE and other camera
operations.
AF calculation speed is therefore
increased, if for no other reason
than the specialization of the new
circuitry. In addition, the 12 Mhz
clock speed of the EOS-1 is faster
than any other SLR except the EOS
630, 43% faster than the EOS 650 &
620.
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