<s>
The	O
self-contained	O
amphibious	O
underwater	O
Calypso	B-Algorithm
35mm	O
film	O
camera	O
was	O
conceived	O
by	O
the	O
marine	O
explorer	O
Jacques	O
Cousteau	O
(	O
1910	O
–	O
1997	O
)	O
,	O
designed	O
by	O
Jean	O
de	O
Wouters	O
and	O
manufactured	O
by	O
Atoms	O
in	O
France	O
.	O
</s>
<s>
The	O
Calypso	B-Algorithm
was	O
sometimes	O
advertised	O
as	O
the	O
"	O
CALYPSO-PHOT	O
"	O
.	O
</s>
<s>
Nikon	O
took	O
over	O
production	O
and	O
sold	O
it	O
from	O
1963	O
as	O
the	O
Nikonos	B-Algorithm
,	O
which	O
subsequently	O
became	O
a	O
well-known	O
series	O
of	O
underwater	O
cameras	O
.	O
</s>
<s>
In	O
order	O
to	O
reach	O
a	O
larger	O
market	O
the	O
design	O
was	O
sold	O
to	O
Nikon	O
in	O
Japan	O
,	O
and	O
in	O
1963	O
released	O
as	O
the	O
Nikonos	B-Algorithm
,	O
subsequently	O
becoming	O
a	O
long-lived	O
series	O
of	O
underwater	O
cameras	O
,	O
culminating	O
with	O
the	O
introduction	O
of	O
the	O
short-lived	O
35mm	O
SLR	B-Algorithm
Nikonos	B-Algorithm
RS	O
in	O
1992	O
.	O
</s>
<s>
The	O
Calypso	B-Algorithm
is	O
equally	O
suitable	O
for	O
water	O
and	O
air	O
environment	O
photography	O
.	O
</s>
<s>
The	O
most	O
unusual	O
feature	O
of	O
the	O
Calypso	B-Algorithm
is	O
the	O
combined	O
wind-on	O
and	O
shutter	O
release	O
lever	O
.	O
</s>
<s>
No	O
rewind	O
release	O
facility	O
is	O
required	O
;	O
this	O
function	O
was	O
later	O
added	O
to	O
the	O
Nikonos	B-Algorithm
and	O
marked	O
R	O
on	O
the	O
shutter-speed	O
dial	O
.	O
</s>
<s>
The	O
special	O
Calypso	B-Algorithm
lens	O
mount	O
is	O
of	O
the	O
bayonet	O
variety	O
with	O
an	O
O-ring	O
sealing	O
.	O
</s>
<s>
The	O
original	O
lenses	O
are	O
listed	O
below	O
;	O
however	O
later	O
Nikonos	B-Algorithm
LW-	O
,	O
W-	O
,	O
and	O
UW-Nikkor	O
lenses	O
use	O
the	O
same	O
bayonet	O
mount	O
and	O
are	O
compatible	O
.	O
</s>
<s>
Two	O
large	O
aluminium	O
knobs	O
either	O
side	O
of	O
the	O
lens	O
provides	O
aperture	B-General_Concept
and	O
focusing	O
controls	O
.	O
</s>
<s>
The	O
vertical	O
running	O
metal-plate	O
focal-plane	O
shutter	O
of	O
the	O
original	O
Calypso	B-Algorithm
has	O
speeds	O
from	O
1/30	O
to	O
1/1000	O
second	O
,	O
but	O
a	O
year	O
later	O
that	O
was	O
changed	O
to	O
1/15	O
to	O
1/500	O
second	O
.	O
</s>
<s>
The	O
camera	O
was	O
very	O
early	O
on	O
advertised	O
,	O
and	O
possibly	O
sold	O
as	O
,	O
the	O
Calypso	B-Algorithm
Phot	O
.	O
</s>
