<s>
The	O
Canon	B-Algorithm
AL-1	I-Algorithm
was	O
an	O
FD	B-Algorithm
mount	I-Algorithm
,	O
35mm	O
single-lens	B-Algorithm
reflex	I-Algorithm
camera	I-Algorithm
introduced	O
in	O
March	O
1982	O
.	O
</s>
<s>
Its	O
main	O
feature	O
was	O
the	O
"	O
Quick	O
Focus	O
"	O
focus-assist	O
system	O
that	O
was	O
aimed	O
at	O
those	O
who	O
had	O
trouble	O
focusing	O
through	O
the	O
viewfindereither	O
novices	O
,	O
or	O
those	O
with	O
poor	O
eyesightand	O
was	O
intended	O
to	O
head	O
off	O
competition	O
from	O
the	O
first	O
full-autofocus	O
cameras	O
from	O
other	O
manufacturers	O
,	O
such	O
as	O
the	O
Pentax	B-Algorithm
ME	I-Algorithm
F	I-Algorithm
.	O
</s>
<s>
An	O
ISO	O
hotshoe	B-Algorithm
,	O
A-series	O
power	O
winder	O
connections	O
,	O
and	O
cable-release	O
socket	O
provide	O
an	O
acceptable	O
level	O
of	O
compatibility	O
with	O
accessories	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
last	O
SLR	B-Algorithm
camera	I-Algorithm
to	O
carry	O
Canon	O
's	O
1960s-era	O
logo	O
on	O
the	O
pentaprism	O
.	O
</s>
<s>
The	O
camera	O
uses	O
Canon	O
's	O
breech-lock	B-Algorithm
FD	I-Algorithm
mount	I-Algorithm
,	O
and	O
so	O
users	O
could	O
choose	O
from	O
the	O
wide	O
variety	O
of	O
Canon	B-Algorithm
FD	I-Algorithm
lenses	O
,	O
as	O
well	O
as	O
those	O
from	O
third	O
parties	O
.	O
</s>
<s>
In	O
1987	O
,	O
Canon	O
abandoned	O
the	O
FD	B-Algorithm
mount	I-Algorithm
in	O
favour	O
of	O
the	O
EF	B-Application
mount	I-Application
along	O
with	O
the	O
EOS	B-Algorithm
camera	I-Algorithm
system	O
,	O
which	O
uses	O
the	O
same	O
concept	O
as	O
the	O
T80	B-Algorithm
but	O
with	O
a	O
new	O
and	O
incompatible	O
mount	O
designed	O
around	O
an	O
all-electronic	O
interface	O
.	O
</s>
<s>
While	O
far	O
from	O
a	O
true	O
autofocus	O
system	O
,	O
the	O
camera	O
acted	O
a	O
test	O
for	O
Canon	O
engineers	O
to	O
evaluate	O
phase	O
detection	O
for	O
SLR	B-Algorithm
cameras	I-Algorithm
.	O
</s>
<s>
The	O
QF	O
focus-assist	O
system	O
uses	O
traditional	O
phase	O
detection	O
linear	O
CCD	B-Algorithm
arrays	I-Algorithm
in	O
the	O
base	O
of	O
the	O
camera	O
.	O
</s>
<s>
Contrast	O
detection	O
is	O
the	O
system	O
used	O
for	O
autofocus	O
on	O
most	O
compact	O
digital	B-Device
cameras	I-Device
in	O
recent	O
years	O
.	O
</s>
<s>
In	O
1983	O
Nikon	B-Algorithm
introduced	O
the	O
F3AF	B-Algorithm
,	O
a	O
special	O
version	O
of	O
their	O
pro-series	O
F3	B-Algorithm
,	O
which	O
used	O
a	O
special	O
viewfinder	O
with	O
a	O
built-in	O
autofocus	O
system	O
connecting	O
electronically	O
to	O
a	O
motor	O
in	O
the	O
lens	O
.	O
</s>
<s>
In	O
1985	O
Minolta	O
introduced	O
the	O
Maxxum	B-Algorithm
7000	I-Algorithm
(	O
Dynax	O
7000	O
in	O
Europe	O
and	O
Asia	O
)	O
,	O
the	O
world	O
's	O
first	O
body-integrated	O
autofocus	O
SLR	B-Algorithm
.	O
</s>
<s>
Canon	O
reacted	O
to	O
this	O
with	O
the	O
T80	B-Algorithm
,	O
which	O
integrated	O
the	O
focus	O
system	O
into	O
the	O
body	O
and	O
,	O
as	O
with	O
the	O
F3AF	B-Algorithm
,	O
connected	O
electronically	O
with	O
a	O
motor	O
in	O
the	O
lens	O
.	O
</s>
