<s>
The	O
Canon	B-Algorithm
Canonet	I-Algorithm
G-III	O
QL17	O
is	O
a	O
coupled-rangefinder	O
,	O
leaf-shuttered	O
,	O
fixed-focal-length	O
35	O
mm	O
camera	O
first	O
manufactured	O
by	O
Canon	O
in	O
1972	O
.	O
</s>
<s>
It	O
features	O
fully	O
shutter-priority	B-Algorithm
automatic	O
exposure	O
and	O
fully	O
manual	O
shooting	O
modes	O
.	O
</s>
<s>
The	O
Canonet	B-Algorithm
G-III	O
is	O
the	O
third	O
generation	O
of	O
Canonet	B-Algorithm
,	O
following	O
the	O
original	O
Canonet	B-Algorithm
and	O
the	O
New	O
Canonet	B-Algorithm
.	O
</s>
<s>
The	O
integrated	O
lightmeter	O
provides	O
shutter	B-Algorithm
priority	I-Algorithm
and	O
manual	O
modes	O
.	O
</s>
<s>
The	O
Canonet	B-Algorithm
can	O
use	O
standard	O
flashes	O
,	O
or	O
the	O
Canolite	O
D	O
which	O
was	O
custom-designed	O
for	O
the	O
Canonet	B-Algorithm
.	O
</s>
<s>
The	O
exposure	O
meter	O
uses	O
a	O
PX625	O
mercury	B-Algorithm
battery	I-Algorithm
,	O
which	O
is	O
now	O
discontinued	O
.	O
</s>
<s>
Furthermore	O
,	O
the	O
mercury	B-Algorithm
battery	I-Algorithm
has	O
a	O
life	O
span	O
of	O
several	O
years	O
,	O
compared	O
to	O
a	O
few	O
months	O
for	O
the	O
alkaline	O
battery	O
.	O
</s>
<s>
This	O
battery	O
has	O
the	O
same	O
voltage	O
as	O
the	O
PX625	O
mercury	B-Algorithm
battery	I-Algorithm
,	O
and	O
therefore	O
is	O
seen	O
as	O
a	O
viable	O
replacement	O
by	O
many	O
.	O
</s>
