<s>
At	O
the	O
height	O
of	O
their	O
popularity	O
in	O
the	O
1950s	O
and	O
1960s	O
,	O
many	O
brands	O
of	O
movie	B-Application
cameras	I-Application
came	O
with	O
a	O
Wollensak	O
Velostigmat	O
lens	O
.	O
</s>
<s>
They	O
made	O
shutters	O
such	O
as	O
the	O
Betax	O
,	O
Alphax	O
,	O
Optimo	O
and	O
,	O
for	O
the	O
Graflex	B-Algorithm
Corporation	O
,	O
Rapax	O
.	O
</s>
<s>
Wollensak	O
purchased	O
the	O
Fastax	B-Algorithm
high	O
speed	O
rotating-prism	O
camera	O
developed	O
by	O
Bell	O
Labs	O
from	O
Western	O
Electric	O
,	O
and	O
improved	O
it	O
to	O
a	O
rate	O
of	O
10,000	O
frames/second	O
.	O
</s>
<s>
Fastax	B-Algorithm
cameras	O
were	O
used	O
for	O
recording	O
projectiles	O
and	O
explosions	O
,	O
including	O
nuclear	O
explosions	O
.	O
</s>
<s>
Wollensak	O
made	O
only	O
one	O
still	O
camera	O
model	O
,	O
the	O
"	O
Stereo	O
10	O
"	O
35mm	O
3D	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
They	O
formed	O
a	O
partnership	O
with	O
the	O
Revere	O
Camera	O
Company	O
that	O
led	O
to	O
them	O
offering	O
some	O
movie	B-Application
cameras	I-Application
(	O
mostly	O
8mm	O
)	O
under	O
their	O
name	O
in	O
the	O
1950s	O
and	O
early	O
1960s	O
.	O
</s>
<s>
They	O
were	O
among	O
the	O
first	O
manufacturers	O
of	O
cassette	B-Device
decks	O
,	O
as	O
well	O
as	O
8-track	O
decks	O
for	O
home	O
use	O
.	O
</s>
