<s>
The	O
Canon	B-Algorithm
T80	I-Algorithm
is	O
Canon	O
's	O
first	O
autofocus	O
35mm	O
single-lens	B-Algorithm
reflex	I-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
April	O
1985	O
and	O
discontinued	O
in	O
June	O
1986	O
and	O
is	O
part	O
of	O
the	O
T	B-Algorithm
series	I-Algorithm
of	O
FD	B-Algorithm
mount	I-Algorithm
cameras	O
.	O
</s>
<s>
It	O
is	O
not	O
compatible	O
with	O
Canon	O
's	O
later	O
EOS	B-Algorithm
system	O
and	O
its	O
autofocus	O
EF-mount	B-Application
lenses	O
.	O
</s>
<s>
The	O
autofocus	O
system	O
in	O
the	O
T80	O
works	O
in	O
the	O
same	O
manner	O
as	O
the	O
focus	O
assist	O
system	O
built	O
into	O
the	O
earlier	O
AL-1	B-Algorithm
.	O
</s>
<s>
A	O
linear	O
CCD	B-Algorithm
is	O
used	O
to	O
detect	O
contrast	O
in	O
the	O
focus	O
area	O
.	O
</s>
<s>
This	O
is	O
a	O
similar	O
mechanism	O
to	O
that	O
used	O
in	O
compact	O
digital	B-Device
cameras	I-Device
.	O
</s>
<s>
When	O
a	O
manual	O
focus	O
lens	O
is	O
used	O
,	O
the	O
camera	O
provides	O
focus	O
assistance	O
in	O
exactly	O
the	O
same	O
manner	O
as	O
the	O
AL-1	B-Algorithm
.	O
</s>
<s>
Except	O
for	O
its	O
autofocus	O
capability	O
,	O
the	O
T80	O
is	O
very	O
similar	O
to	O
the	O
earlier	O
T70	B-Algorithm
,	O
with	O
four	O
programmed	O
scene	O
modes	O
in	O
addition	O
to	O
regular	O
Program	O
auto-exposure	O
(	O
AE	O
)	O
.	O
</s>
<s>
Film	O
transport	O
in	O
the	O
T80	O
is	O
completely	O
automatic	O
,	O
just	O
as	O
in	O
the	O
T70	B-Algorithm
,	O
in	O
both	O
directions	O
.	O
</s>
<s>
Indicators	O
on	O
the	O
top	O
LCD	B-Device
display	I-Device
the	O
status	O
of	O
loading	O
,	O
winding	O
and	O
rewinding	O
.	O
</s>
<s>
The	O
motor	O
,	O
and	O
the	O
camera	O
's	O
other	O
functions	O
including	O
the	O
focusing	O
motor	O
in	O
the	O
lens	O
,	O
are	O
powered	O
by	O
4	O
AAA	B-Algorithm
batteries	I-Algorithm
housed	O
in	O
the	O
base	O
of	O
the	O
camera	O
.	O
</s>
<s>
There	O
is	O
one	O
other	O
Canon	B-Algorithm
FD	I-Algorithm
autofocus	O
lens	O
,	O
the	O
Canon	O
New	O
FD	O
35-70	O
mm	O
f/4	O
AF	O
.	O
</s>
<s>
Canon	O
,	O
unlike	O
Minolta	O
and	O
Nikon	B-Algorithm
,	O
was	O
convinced	O
that	O
having	O
the	O
motor	O
in	O
the	O
lens	O
was	O
the	O
optimal	O
approach	O
;	O
this	O
line	O
of	O
thinking	O
continued	O
with	O
the	O
new	O
EOS	B-Algorithm
system	O
in	O
1987	O
,	O
which	O
remains	O
Canon	O
's	O
standard	O
mounting	O
system	O
for	O
SLRs	B-Algorithm
today	O
.	O
</s>
