<s>
The	O
Olympus	B-Algorithm
Chrome	I-Algorithm
Six	I-Algorithm
is	O
a	O
series	O
of	O
folding	O
cameras	O
made	O
by	O
Takachiho	O
and	O
later	O
Olympus	O
from	O
1948	O
to	O
1956	O
,	O
for	O
6×	O
4.5	O
or	O
6×6	O
exposures	O
on	O
120	O
film	O
.	O
</s>
<s>
In	O
1951	O
Olympus	O
launched	O
the	O
Olympus	B-Algorithm
Chrome	I-Algorithm
Six	I-Algorithm
IIIA	O
,	O
a	O
successor	O
to	O
the	O
Olympus	B-Algorithm
Chrome	I-Algorithm
Six	I-Algorithm
I	O
.	O
</s>
<s>
The	O
Olympus	B-Algorithm
Chrome	I-Algorithm
Six	I-Algorithm
RIIA	O
was	O
launched	O
four	O
years	O
later	O
in	O
1955	O
.	O
</s>
<s>
It	O
had	O
a	O
high-precision	O
rangefinder	B-Algorithm
(	O
not	O
coupled	O
with	O
the	O
lens	O
)	O
,	O
and	O
was	O
the	O
most	O
advanced	O
camera	O
of	O
the	O
series	O
.	O
</s>
