<s>
The	O
ADOX	B-Algorithm
Polo	I-Algorithm
was	O
a	O
consumer-class	O
,	O
viewfinder	O
camera	O
with	O
a	O
completely	O
manual	O
operating	O
system	O
.	O
</s>
<s>
The	O
viewfinder	O
had	O
neither	O
lines	O
for	O
parallax	B-Device
compensation	O
,	O
nor	O
for	O
outlining	O
the	O
edge	O
of	O
the	O
negative	O
.	O
</s>
<s>
There	O
was	O
no	O
rangefinder	B-Algorithm
.	O
</s>
<s>
It	O
offered	O
three	O
shutter	O
speeds	O
and	O
aperture	B-General_Concept
values	O
had	O
to	O
be	O
set	O
by	O
a	O
separate	O
light	O
meter	O
,	O
by	O
guesswork	O
or	O
by	O
following	O
the	O
coarse	O
exposure	O
guide	O
on	O
the	O
film	O
package	O
.	O
</s>
<s>
An	O
accessory	B-Algorithm
shoe	I-Algorithm
was	O
on	O
the	O
top	O
of	O
the	O
housing	O
but	O
without	O
a	O
'	O
hot-shoe	B-Algorithm
'	O
contact	O
.	O
</s>
