<s>
The	O
Nikon	B-Algorithm
E	O
series	O
,	O
co-developed	O
with	O
Fujifilm	O
,	O
are	O
autofocus	O
1.3	O
megapixel	O
professional	O
grade	O
quasi-full	O
frame	O
(	O
35mm	O
)	O
Nikon	B-Architecture
F-mount	I-Architecture
digital	B-Device
single	I-Device
lens	I-Device
reflex	I-Device
cameras	I-Device
(	O
DSLR	B-Device
)	O
manufactured	O
by	O
Nikon	B-Algorithm
since	O
1995	O
.	O
</s>
<s>
The	O
E	O
series	O
included	O
the	O
Nikon	B-Algorithm
E2/E2S	O
,	O
Nikon	B-Algorithm
E2N/E2NS	O
and	O
the	O
Nikon	B-Algorithm
E3/E3S	O
.	O
</s>
<s>
Its	O
unique	O
optical	O
system	O
bundles	O
the	O
light	O
of	O
the	O
full-frame	O
lenses	O
to	O
the	O
small	O
2/3	O
inch	O
CCD	B-Algorithm
sensor	I-Algorithm
.	O
</s>
<s>
The	O
Nikon	B-Algorithm
E2/E2S	O
and	O
E2N/E2NS	O
use	O
a	O
Nikon	B-Algorithm
F4	I-Algorithm
subsystem	O
,	O
the	O
E3/E3S	O
uses	O
a	O
Nikon	B-Algorithm
F100	I-Algorithm
subsystem	O
.	O
</s>
<s>
This	O
comes	O
not	O
at	O
the	O
expense	O
of	O
the	O
F-stop	O
of	O
the	O
lenses	O
,	O
because	O
the	O
light	O
is	O
bundled	O
to	O
the	O
inch	O
CCD	B-Algorithm
sensor	I-Algorithm
with	O
approximately	O
16	O
times	O
smaller	O
area	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
the	O
noise	O
of	O
the	O
camera	O
at	O
ISO	O
800	O
full-frame	O
is	O
equivalent	O
to	O
ISO	O
50	O
of	O
the	O
inch	O
CCD	B-Algorithm
sensor	I-Algorithm
.	O
</s>
<s>
Nikon	B-Algorithm
could	O
not	O
reduce	O
sensitivity	O
below	O
800	O
ISO	O
full-frame	O
,	O
because	O
the	O
little	O
sensor	O
will	O
be	O
overexposed	O
below	O
50	O
ISO	O
.	O
</s>
<s>
Although	O
the	O
camera	O
is	O
small	O
for	O
a	O
90s	O
DSLR	B-Device
,	O
the	O
additional	O
optical	O
system	O
makes	O
the	O
camera	O
deeper	O
compared	O
to	O
today	O
's	O
DSLRs	B-Device
.	O
</s>
<s>
Standard	O
Nikon	B-Architecture
F-mount	I-Architecture
lenses	O
can	O
be	O
used	O
.	O
</s>
<s>
A	O
PCMCIA	B-Architecture
compatible	O
memory	O
card	O
is	O
used	O
.	O
</s>
<s>
It	O
can	O
be	O
accessed	O
via	O
a	O
SCSI	B-Architecture
connector	B-Protocol
.	O
</s>
<s>
Nikon	B-Algorithm
gained	O
knowledge	O
on	O
digital	O
cameras	O
(	O
still	B-Algorithm
video	I-Algorithm
cameras	I-Algorithm
,	O
with	O
analog	O
storage	O
)	O
by	O
constructing	O
the	O
Nikon	B-Algorithm
Still	B-Algorithm
Video	I-Algorithm
Camera	I-Algorithm
(	O
SVC	O
)	O
Model	O
1	O
,	O
a	O
prototype	O
which	O
was	O
first	O
presented	O
at	O
photokina	O
1986	O
.	O
</s>
<s>
The	O
follower	O
Nikon	B-Algorithm
QV-1000C	O
Still	B-Algorithm
Video	I-Algorithm
Camera	I-Algorithm
was	O
produced	O
since	O
1988	O
mainly	O
for	O
professional	O
press	O
use	O
.	O
</s>
<s>
Both	O
cameras	O
used	O
QV	O
mount	O
lenses	O
,	O
a	O
variant	O
of	O
F-mount	B-Architecture
lenses	O
.	O
</s>
<s>
The	O
Nikon	B-Algorithm
NASA	I-Algorithm
F4	I-Algorithm
was	O
one	O
of	O
the	O
first	O
cameras	O
with	O
digital	O
storage	O
.	O
</s>
<s>
Eastman	O
Kodak	O
used	O
Nikon	B-Algorithm
SLR	O
's	O
to	O
design	O
the	O
Kodak	B-Device
DCS	I-Device
100	I-Device
and	O
followers	O
.	O
</s>
<s>
The	O
Nikon	B-Algorithm
E3	O
and	O
Nikon	B-Algorithm
E3S	O
,	O
co-developed	O
with	O
Fujifilm	O
and	O
marketed	O
also	O
as	O
the	O
Fujix	O
DS-560	O
and	O
Fujix	B-Device
DS-565	I-Device
,	O
are	O
autofocus	O
1.3	O
megapixel	O
professional	O
grade	O
quasi-full	O
frame	O
(	O
35mm	O
)	O
digital	B-Device
single	I-Device
lens	I-Device
reflex	I-Device
cameras	I-Device
(	O
DSLR	B-Device
)	O
announced	O
by	O
the	O
Nikon	B-Algorithm
Corporation	O
on	O
15	O
June	O
1998	O
and	O
released	O
in	O
December	O
1999	O
.	O
</s>
<s>
They	O
are	O
followers	O
of	O
the	O
Nikon	B-Algorithm
E2N/E2NS	O
.	O
</s>
