<s>
The	O
Nikon	B-Algorithm
D1	I-Algorithm
is	O
a	O
digital	B-Device
single-lens	I-Device
reflex	I-Device
camera	I-Device
(	O
DSLR	B-Device
)	O
made	O
by	O
Nikon	B-Algorithm
Corporation	I-Algorithm
introduced	O
on	O
June	O
15	O
,	O
1999	O
.	O
</s>
<s>
It	O
featured	O
a	O
2.7-megapixel	O
image	B-Algorithm
sensor	I-Algorithm
,	O
4.5-frames-per-second	O
continuous	O
shooting	O
,	O
and	O
accepted	O
the	O
full	O
range	O
of	O
Nikon	B-Architecture
F-mount	I-Architecture
lenses	O
.	O
</s>
<s>
The	O
camera	O
body	O
strongly	O
resembled	O
the	O
F5	B-Algorithm
and	O
had	O
the	O
same	O
general	O
layout	O
of	O
controls	O
,	O
allowing	O
users	O
of	O
Nikon	B-Algorithm
film	O
SLR	O
cameras	O
to	O
quickly	O
become	O
proficient	O
in	O
using	O
the	O
camera	O
.	O
</s>
<s>
Although	O
Nikon	B-Algorithm
and	O
other	O
manufacturers	O
had	O
produced	O
digital	B-Device
SLR	I-Device
cameras	I-Device
for	O
several	O
years	O
prior	O
,	O
the	O
D1	O
was	O
the	O
first	O
professional	O
digital	B-Device
SLR	I-Device
that	O
displaced	O
Kodak	O
's	O
then-undisputed	O
reign	O
over	O
the	O
professional	O
market	O
.	O
</s>
<s>
Unusual	O
for	O
a	O
DSLR	B-Device
,	O
the	O
D1	O
uses	O
the	O
NTSC	O
color	O
space	O
instead	O
of	O
the	O
conventional	O
sRGB	O
or	O
Adobe	O
RGB	O
color	O
spaces	O
.	O
</s>
<s>
The	O
D1H	O
was	O
oriented	O
towards	O
fast-action	O
photography	O
,	O
keeping	O
the	O
same	O
2.7	O
megapixels	O
image	B-Algorithm
sensor	I-Algorithm
as	O
the	O
D1	O
,	O
but	O
pushing	O
the	O
frame	O
rate	O
to	O
5	O
frame/s	O
for	O
up	O
to	O
40	O
consecutive	O
shots	O
.	O
</s>
<s>
At	O
that	O
time	O
the	O
major	O
market	O
leader	O
for	O
DSLR	B-Device
cameras	I-Device
was	O
Kodak	O
,	O
who	O
produced	O
their	O
own	O
image	B-Algorithm
sensors	I-Algorithm
and	O
assembled	O
digital	O
cameras	O
under	O
the	O
brand	O
Kodak	B-Device
DCS	I-Device
.	O
</s>
<s>
The	O
DCS	O
cameras	O
were	O
based	O
upon	O
35	O
mm	O
SLR	O
cameras	O
,	O
replacing	O
the	O
film	O
back	O
with	O
one	O
incorporating	O
a	O
CCD	B-Algorithm
sensor	I-Algorithm
.	O
</s>
<s>
While	O
these	O
cameras	O
offered	O
the	O
convenience	O
of	O
digital	O
imaging	O
to	O
normal	O
photographers	O
,	O
their	O
appeal	O
was	O
limited	O
by	O
huge	O
price-tags	O
and	O
issues	O
with	O
sensor	B-Algorithm
size	I-Algorithm
,	O
resolution	O
,	O
and	O
performance	O
in	O
comparison	O
to	O
film	O
.	O
</s>
<s>
Nikon	B-Algorithm
therefore	O
stood	O
to	O
gain	O
a	O
significant	O
market	O
advantage	O
if	O
they	O
could	O
manage	O
to	O
offer	O
a	O
digital	O
camera	O
that	O
had	O
been	O
designed	O
from	O
the	O
ground	O
up	O
.	O
</s>
<s>
The	O
goal	O
was	O
ambitious	O
;	O
Nikon	B-Algorithm
sought	O
to	O
produce	O
professional-grade	O
cameras	O
using	O
large	O
high-resolution	O
sensors	O
for	O
only	O
a	O
few	O
thousand	O
dollars	O
at	O
a	O
time	O
when	O
the	O
Kodak	B-Device
DCS	I-Device
460	O
,	O
based	O
on	O
a	O
Nikon	B-Algorithm
F90X	O
and	O
provided	O
with	O
a	O
6	O
megapixel	O
27.6	O
×	O
18.4	O
mm	O
CCD	B-Algorithm
sensor	I-Algorithm
,	O
was	O
retailing	O
for	O
over	O
US$	O
30,000	O
.	O
</s>
<s>
Initially	O
no	O
major	O
sensor	O
manufacturer	O
was	O
prepared	O
to	O
produce	O
the	O
sensor	O
for	O
Nikon	B-Algorithm
,	O
believing	O
that	O
the	O
predicted	O
sales	O
volumes	O
were	O
completely	O
unrealistic	O
.	O
</s>
<s>
The	O
final	O
design	O
that	O
was	O
used	O
in	O
the	O
D1	O
was	O
for	O
a	O
23.7	O
×	O
15.6	O
mm	O
CCD	B-Algorithm
producing	O
images	O
with	O
a	O
final	O
resolution	O
of	O
2000	O
×	O
1312	O
pixels	B-Algorithm
(	O
approximately	O
2.7	O
megapixels	O
)	O
,	O
and	O
this	O
was	O
the	O
figure	O
used	O
for	O
marketing	O
the	O
camera	O
.	O
</s>
<s>
In	O
a	O
later	O
"	O
behind	O
the	O
scenes	O
"	O
interview	O
published	O
on	O
the	O
Nikon	B-Algorithm
website	O
it	O
was	O
revealed	O
by	O
the	O
General	O
Manager	O
of	O
Nikon	B-Algorithm
's	O
Imaging	O
Development	O
Management	O
Department	O
that	O
the	O
sensor	O
developed	O
for	O
and	O
used	O
in	O
the	O
D1	O
,	O
and	O
subsequently	O
the	O
D1H	O
,	O
actually	O
used	O
10.8	O
million	O
photosites	B-Algorithm
rather	O
than	O
the	O
2.7	O
million	O
that	O
had	O
previously	O
been	O
suggested	O
.	O
</s>
<s>
This	O
allowed	O
multiple	O
photosites	B-Algorithm
to	O
be	O
grouped	O
together	O
into	O
units	O
that	O
formed	O
the	O
final	O
pixels	B-Algorithm
in	O
the	O
image	O
,	O
contributing	O
to	O
the	O
sensor	O
's	O
high	O
sensitivity	O
and	O
excellent	O
signal-to-noise	O
ratio	O
.	O
</s>
