<s>
The	O
Nikon	B-Algorithm
1-mount	I-Algorithm
is	O
a	O
type	O
of	O
interchangeable	B-Algorithm
lens	I-Algorithm
mount	O
developed	O
by	O
Nikon	B-Algorithm
for	O
its	O
Nikon	B-Algorithm
CX	I-Algorithm
format	I-Algorithm
mirrorless	B-Device
interchangeable-lens	I-Device
cameras	I-Device
.	O
</s>
<s>
The	O
1-mount	O
was	O
first	O
introduced	O
on	O
the	O
Nikon	B-Algorithm
1	I-Algorithm
series	I-Algorithm
in	O
2011	O
,	O
and	O
features	O
a	O
bayonet	O
mount	O
.	O
</s>
<s>
The	O
F-mount	B-Architecture
adapter	O
FT1	O
enables	O
the	O
use	O
of	O
all	O
F-mount	B-Architecture
lenses	O
especially	O
with	O
integrated	O
autofocus	O
motor	O
.	O
</s>
<s>
It	O
further	O
mounts	O
Pre-AI	O
,	O
AI	O
,	O
AI-S	O
and	O
E	O
lenses	O
without	O
metering	O
as	O
well	O
as	O
lenses	O
which	O
jut	O
out	O
the	O
F-mount	B-Architecture
(	O
needing	O
mirror	O
lock-up	O
on	O
cameras	O
with	O
mirror	O
)	O
.	O
</s>
<s>
Lenses	O
are	O
optically	O
identical	O
to	O
their	O
non-sealed	O
counterparts	O
and	O
use	O
the	O
same	O
bayonet	O
,	O
but	O
have	O
an	O
extended	O
flange	O
to	O
ensure	O
a	O
watertight	O
seal	O
with	O
the	O
Nikon	B-Algorithm
1	I-Algorithm
AW1	O
body	O
.	O
</s>
<s>
At	O
the	O
Nikon	B-Algorithm
1	I-Algorithm
launch	O
in	O
October	O
2011	O
,	O
Nikon	B-Algorithm
showcased	O
seven	O
prototype	O
lenses	O
.	O
</s>
<s>
Nikon	B-Algorithm
discontinued	O
the	O
Nikon	B-Algorithm
1	I-Algorithm
line	O
in	O
2018	O
,	O
including	O
cancelling	O
any	O
future	O
lens	O
releases	O
.	O
</s>
