<s>
The	O
Praktica	B-Algorithm
IV	I-Algorithm
is	O
a	O
35mm	O
SLR	B-Algorithm
with	O
M42	B-Algorithm
thread	O
mount	O
that	O
was	O
launched	O
by	O
Kamera-Werkstätten	O
(	O
KW	O
)	O
in	O
1959	O
.	O
</s>
<s>
The	O
Praktica	B-Algorithm
IV	I-Algorithm
was	O
based	O
on	O
the	O
Praktina	O
FX	O
,	O
and	O
was	O
actually	O
the	O
first	O
Praktica	O
to	O
have	O
a	O
fixed	O
pentaprism	O
.	O
</s>
