<s>
The	O
Kodak	B-Algorithm
35	I-Algorithm
Rangefinder	I-Algorithm
is	O
an	O
improved	O
version	O
of	O
the	O
Kodak	B-Algorithm
35	I-Algorithm
that	O
was	O
launched	O
by	O
the	O
Eastman	O
Kodak	O
Company	O
in	O
1938	O
as	O
their	O
first	O
35mm	O
camera	O
manufactured	O
in	O
the	O
USA	O
.	O
</s>
<s>
After	O
some	O
two	O
years	O
,	O
the	O
Company	O
presented	O
this	O
improved	O
Kodak	B-Algorithm
35	I-Algorithm
camera	O
,	O
with	O
a	O
new	O
superstructure	O
housing	O
containing	O
a	O
viewfinder	O
and	O
a	O
separate	O
rangefinder	B-Algorithm
,	O
but	O
without	O
any	O
addition	O
to	O
the	O
identifying	O
inscription	O
on	O
the	O
body	O
.	O
</s>
<s>
It	O
is	O
generally	O
referred	O
to	O
as	O
the	O
Kodak	B-Algorithm
35	I-Algorithm
Rangefinder	I-Algorithm
model	O
.	O
</s>
<s>
An	O
external	O
mechanism	O
,	O
hidden	O
inside	O
the	O
protrusion	O
at	O
the	O
left-hand	O
side	O
of	O
the	O
lens/shutter	O
assembly	O
,	O
relays	O
the	O
front	O
lens	O
element	O
extension	O
to	O
the	O
rangefinder	B-Algorithm
optics	O
by	O
sensing	O
the	O
height	O
of	O
a	O
milled	O
cam	O
at	O
the	O
periphery	O
of	O
the	O
lens	O
barrel	O
just	O
behind	O
the	O
toothed	O
rim	O
.	O
</s>
<s>
Both	O
the	O
separate	O
viewfinder	O
and	O
rangefinder	B-Algorithm
eyepieces	O
and	O
the	O
lens	O
coupling	O
are	O
in	O
the	O
style	O
of	O
the	O
Leica	O
camera	O
.	O
</s>
<s>
Looking	O
through	O
the	O
small	O
rangefinder	B-Algorithm
window	O
at	O
the	O
left-hand	O
side	O
at	O
the	O
back	O
reveals	O
a	O
clear	O
view	O
of	O
a	O
horizontally	O
split	O
image	O
.	O
</s>
<s>
By	O
aligning	O
the	O
vertical	O
feature	O
of	O
any	O
object	O
in	O
the	O
motive	O
that	O
crosses	O
the	O
split	O
in	O
the	O
rangefinder	B-Algorithm
image	O
may	O
render	O
it	O
sharp	O
on	O
the	O
film	O
.	O
</s>
<s>
The	O
Rangefinder	B-Algorithm
model	O
was	O
made	O
available	O
with	O
a	O
variety	O
of	O
shutter	O
and	O
lens	O
combinations	O
during	O
its	O
production	O
run	O
,	O
which	O
ended	O
in	O
1951	O
:	O
</s>
<s>
The	O
gear	O
however	O
,	O
only	O
provides	O
a	O
means	O
of	O
turning	O
the	O
front	O
element	O
using	O
a	O
finger	O
on	O
the	O
edge	O
of	O
the	O
wheel	O
,	O
and	O
is	O
no	O
part	O
of	O
the	O
link	O
between	O
the	O
lens	O
and	O
the	O
rangefinder	B-Algorithm
.	O
</s>
<s>
Some	O
RF	O
models	O
have	O
black	O
knobs	O
and	O
some	O
have	O
black	O
rangefinder	B-Algorithm
protrusion	O
next	O
to	O
the	O
lens	O
,	O
but	O
the	O
majority	O
have	O
plated	O
metal	O
knobs	O
.	O
</s>
<s>
The	O
post-war	O
viewfinder	O
and	O
the	O
rangefinder	B-Algorithm
models	O
were	O
also	O
black	O
with	O
bright-chromed	O
metal	O
features	O
,	O
and	O
an	O
accessory	B-Algorithm
shoe	I-Algorithm
was	O
added	O
to	O
the	O
viewfinder	O
model	O
next	O
to	O
the	O
rewind	O
knob	O
.	O
</s>
<s>
The	O
Kodak	B-Algorithm
35	I-Algorithm
came	O
with	O
a	O
hard	O
brown	O
leather	O
ever-ready	O
case	O
.	O
</s>
<s>
The	O
Kodak	B-Algorithm
35	I-Algorithm
serial	O
number	O
is	O
engraved	O
on	O
the	O
front	O
ring	O
on	O
the	O
lens	O
.	O
</s>
