<s>
The	O
Arriflex	B-Device
D-20	I-Device
is	O
a	O
film-style	O
digital	O
motion	B-Application
picture	I-Application
camera	I-Application
made	O
by	O
Arri	O
first	O
introduced	O
in	O
November	O
2005	O
.	O
</s>
<s>
The	O
camera	O
's	O
attributes	O
are	O
its	O
optical	O
viewfinder	O
,	O
modularity	O
,	O
and	O
35mm-width	O
CMOS	B-Architecture
sensor	I-Architecture
.	O
</s>
<s>
The	O
D-20	B-Device
uses	O
a	O
single	O
CMOS	B-Architecture
sensor	I-Architecture
the	O
width	O
of	O
a	O
Super	O
35	O
film	O
gate	O
aperture	O
.	O
</s>
<s>
Effectively	O
the	O
D-20	B-Device
,	O
when	O
used	O
with	O
current	O
35	O
mm	O
PL	O
mount	O
motion	O
picture	O
lenses	O
,	O
yields	O
the	O
same	O
field	O
of	O
view	O
and	O
depth	O
of	O
field	O
as	O
Super	O
35	O
mm	O
film	O
motion	B-Application
picture	I-Application
cameras	I-Application
.	O
</s>
<s>
The	O
D-20	B-Device
captures	O
images	O
in	O
two	O
main	O
modes	O
:	O
</s>
<s>
In	O
Data	O
mode	O
the	O
sensor	O
uses	O
2880x2160	O
active	O
pixels	O
generating	O
RAW	O
Bayer-data	O
at	O
12	O
bit	O
in	O
a	O
4:3	O
aspect	O
ratio	O
.	O
</s>
<s>
Typically	O
,	O
the	O
D-20	B-Device
is	O
tethered	O
to	O
a	O
Sony	O
HDCamSR	O
recorder	O
.	O
</s>
<s>
The	O
D-20	B-Device
has	O
a	O
mechanical	O
shutter	O
,	O
variable	O
from	O
11.2	O
°	O
to	O
180°	O
or	O
an	O
electronic	O
shutter	O
that	O
simulates	O
a	O
270°	O
mechanical	O
shutter	O
at	O
24frame/s	O
.	O
</s>
<s>
Numerous	O
components	O
of	O
the	O
camera	O
were	O
borrowed	O
from	O
Arri	O
film	B-Application
camera	I-Application
models	O
(	O
most	O
notably	O
the	O
435ES	B-Algorithm
)	O
,	O
assuring	O
compatibility	O
with	O
Arri	O
film	B-Application
camera	I-Application
accessories	O
and	O
support	O
equipment	O
.	O
</s>
<s>
Though	O
the	O
D-20	B-Device
system	O
is	O
capable	O
of	O
variable	O
speeds	O
from	O
1	O
to	O
60	O
frames	O
per	O
second	O
,	O
in	O
RAW	O
Data	O
mode	O
these	O
are	O
currently	O
limited	O
to	O
23.976	O
frame/s	O
,	O
24	O
frame/s	O
,	O
25	O
frame/s	O
,	O
29.97	O
frame/s	O
&	O
30	O
frame/s	O
per	O
second	O
.	O
</s>
<s>
The	O
sensitivity	O
of	O
the	O
D-20	B-Device
in	O
video	O
mode	O
is	O
regulated	O
by	O
the	O
application	O
of	O
LUTs	B-Data_Structure
(	O
Look	B-Data_Structure
Up	I-Data_Structure
Tables	I-Data_Structure
)	O
prior	O
to	O
output	O
.	O
</s>
<s>
With	O
sensitivity	O
settings	O
ranging	O
from	O
ISO	O
100	O
to	O
ISO	O
800	O
with	O
linear	O
responses	O
,	O
the	O
D-20	B-Device
also	O
offers	O
log	O
curve	O
options	O
designed	O
to	O
mimic	O
the	O
response	O
of	O
film	O
negative	O
.	O
</s>
<s>
Unlike	O
some	O
other	O
digital	O
cameras	O
,	O
the	O
D-20	B-Device
does	O
not	O
offer	O
gain	O
boost	O
,	O
instead	O
relying	O
on	O
the	O
advantages	O
of	O
adding	O
gain	O
in	O
the	O
post	O
production	O
process	O
.	O
</s>
<s>
The	O
sensitivity	O
of	O
the	O
camera	O
in	O
Data	O
mode	O
is	O
regulated	O
by	O
applying	O
LUTs	B-Data_Structure
in	O
the	O
outboard	O
processing	O
of	O
the	O
image	O
.	O
</s>
<s>
Of	O
the	O
currently	O
available	O
high	O
resolution	O
digital	O
motion	B-Application
picture	I-Application
cameras	I-Application
,	O
the	O
Dalsa	B-Algorithm
Origin	I-Algorithm
,	O
the	O
SI	O
2K	O
and	O
the	O
D-20	B-Device
feature	O
detachable	O
optical	O
viewfinders	O
.	O
</s>
<s>
The	O
D-20	B-Device
also	O
accepts	O
a	O
traditional	O
film	O
style	O
video	O
assist	O
system	O
,	O
sharing	O
the	O
image	O
available	O
through	O
the	O
optical	O
viewfinder	O
.	O
</s>
<s>
Like	O
Arri	O
mechanical	O
cameras	O
,	O
the	O
D-20	B-Device
is	O
modularly	O
constructed	O
so	O
that	O
both	O
the	O
mechanical	O
and	O
electronic	O
components	O
are	O
upgradable	O
over	O
time	O
,	O
the	O
camera	O
however	O
was	O
discontinued	O
in	O
2008	O
and	O
the	O
D-21	O
was	O
introduced	O
.	O
</s>
<s>
Other	O
single-chip	O
Super	O
35	O
mm	O
film-sized	O
digital	O
motion	B-Application
picture	I-Application
cameras	I-Application
directly	O
in	O
competition	O
with	O
the	O
D-20	B-Device
include	O
the	O
Panavision	O
Genesis	B-Device
camera	O
,	O
the	O
Sony	O
F35	O
camera	O
and	O
the	O
Red	O
One	O
camera	O
.	O
</s>
