<s>
The	O
Canon	B-Algorithm
AE-1	I-Algorithm
Program	I-Algorithm
is	O
a	O
35	O
mm	O
single-lens	B-Algorithm
reflex	I-Algorithm
camera	I-Algorithm
that	O
uses	O
Canon	B-Algorithm
's	I-Algorithm
FD	I-Algorithm
mount	I-Algorithm
lenses	O
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
April	O
1981	O
as	O
the	O
successor	O
to	O
the	O
Canon	B-Algorithm
AE-1	I-Algorithm
,	O
five	O
years	O
after	O
that	O
camera	O
's	O
introduction	O
.	O
</s>
<s>
The	O
major	O
difference	O
was	O
the	O
addition	O
of	O
the	O
Program	B-Device
AE	I-Device
mode	I-Device
first	O
seen	O
in	O
the	O
A-1	B-Algorithm
.	O
</s>
<s>
This	O
mode	O
sets	O
both	O
the	O
shutter	O
speed	O
and	O
aperture	B-General_Concept
automaticallyalbeit	O
with	O
a	O
slight	O
bias	O
towards	O
the	O
shutter	O
speed	O
setting	O
.	O
</s>
<s>
The	O
user	O
focuses	O
the	O
camera	O
and	O
then	O
presses	O
the	O
shutter	B-Algorithm
button	I-Algorithm
.	O
</s>
<s>
Like	O
the	O
A-1	B-Algorithm
,	O
the	O
AE-1	O
Program	O
has	O
a	O
right-hand	O
"	O
action	O
grip	O
"	O
on	O
the	O
front	O
of	O
the	O
camera	O
.	O
</s>
<s>
It	O
also	O
supports	O
the	O
A-1	B-Algorithm
'	O
s	O
Motor	B-Algorithm
Drive	I-Algorithm
MA	O
;	O
this	O
requires	O
another	O
electrical	O
contact	O
on	O
the	O
base	O
plate	O
.	O
</s>
<s>
The	O
AE-1	O
'	O
s	O
Power	B-Algorithm
Winder	I-Algorithm
A	O
,	O
and	O
a	O
new	O
,	O
faster	O
Power	B-Algorithm
Winder	I-Algorithm
A2	O
,	O
are	O
also	O
supported	O
.	O
</s>
<s>
Also	O
like	O
the	O
A-1	B-Algorithm
,	O
the	O
AE-1	O
Program	O
supports	O
interchangeable	O
focusing	O
screens	O
.	O
</s>
<s>
Unlike	O
the	O
A-1	B-Algorithm
,	O
though	O
,	O
which	O
specifies	O
that	O
screens	O
should	O
only	O
be	O
changed	O
by	O
the	O
factory	O
or	O
by	O
experienced	O
service	O
technicians	O
,	O
those	O
on	O
the	O
AE-1	O
Program	O
can	O
be	O
changed	O
by	O
the	O
user	O
.	O
</s>
<s>
The	O
camera	O
came	O
standard	O
with	O
the	O
new	O
split/microprism	O
screen	O
,	O
but	O
seven	O
others	O
were	O
available	O
.	O
</s>
<s>
It	O
is	O
the	O
same	O
focusing	O
screen	O
design	O
that	O
is	O
used	O
in	O
the	O
newest	O
model	O
of	O
the	O
top-of-the-line	O
Canon	O
F-1	O
(	O
known	O
as	O
the	O
New	B-Algorithm
F-1	I-Algorithm
)	O
.	O
</s>
<s>
In	O
its	O
day	O
,	O
however	O
,	O
the	O
AE-1	O
Program	O
's	O
automated	O
features	O
and	O
simple	O
controls	O
helped	O
introduce	O
many	O
new	O
consumers	O
to	O
the	O
SLR	B-Algorithm
camera	I-Algorithm
.	O
</s>
