<s>
The	O
Pentax	B-Application
K20D	O
and	O
its	O
clone	O
,	O
the	O
Samsung	B-Algorithm
GX-20	I-Algorithm
,	O
are	O
14.6	O
megapixel	O
digital	B-Device
single-lens	I-Device
reflex	I-Device
cameras	I-Device
manufactured	O
by	O
Pentax	B-Application
that	O
were	O
announced	O
on	O
January	O
23	O
,	O
2008	O
.	O
</s>
<s>
The	O
K20D	O
and	O
GX-20	O
bodies	O
were	O
developed	O
by	O
Pentax	B-Application
,	O
while	O
the	O
CMOS	B-Architecture
sensor	I-Architecture
was	O
manufactured	O
by	O
Samsung	B-Application
-	O
a	O
result	O
of	O
a	O
partnership	O
begun	O
in	O
2005	O
.	O
</s>
<s>
The	O
K20D	O
is	O
the	O
first	O
Pentax	B-Application
DSLR	B-Device
with	O
a	O
CMOS	B-Architecture
image	I-Architecture
sensor	I-Architecture
co-developed	O
by	O
Pentax	B-Application
and	O
Samsung	B-Application
.	O
</s>
<s>
Samsung	B-Application
's	O
expertise	O
in	O
sensor	O
design	O
is	O
seen	O
as	O
a	O
major	O
benefit	O
to	O
Pentax	B-Application
,	O
which	O
did	O
not	O
release	O
its	B-Algorithm
first	I-Algorithm
DSLR	I-Algorithm
until	O
2003	O
,	O
when	O
most	O
other	O
camera	O
manufacturers	O
had	O
already	O
established	O
themselves	O
in	O
the	O
growing	O
digital	B-Device
SLR	I-Device
market	O
.	O
</s>
<s>
At	O
the	O
time	O
of	O
their	O
release	O
,	O
the	O
K20D	O
and	O
GX-20	O
had	O
the	O
highest	O
resolution	O
sensor	O
in	O
the	O
APS-C	B-Algorithm
image	B-Algorithm
sensor	I-Algorithm
format	I-Algorithm
at	O
14.6	O
megapixels	O
.	O
</s>
<s>
In	O
2009	O
,	O
Pentax	B-Application
announced	O
the	O
K-7	B-Algorithm
,	O
the	O
successor	O
to	O
the	O
K20D	O
,	O
with	O
a	O
modified	O
CMOS	B-Architecture
sensor	I-Architecture
,	O
smaller	O
design	O
,	O
and	O
many	O
new	O
features	O
including	O
HD	O
video	O
recording	O
.	O
</s>
<s>
Users	O
can	O
download	O
firmware	O
updates	O
from	O
the	O
Pentax	B-Application
website	O
.	O
</s>
<s>
The	O
K20D	O
is	O
the	O
successor	O
to	O
the	O
well-reviewed	O
Pentax	B-Algorithm
K10D	I-Algorithm
prosumer	O
DSLR	B-Device
.	O
</s>
<s>
The	O
K20D	O
was	O
released	O
alongside	O
the	O
Pentax	B-Algorithm
K200D	I-Algorithm
,	O
a	O
substantial	O
upgrade	O
of	O
the	O
entry-level	O
Pentax	B-Algorithm
K100D	I-Algorithm
.	O
</s>
<s>
a	O
CMOS	B-Architecture
image	I-Architecture
sensor	I-Architecture
with	O
:	O
</s>
<s>
A	O
trap-focus	O
feature	O
which	O
works	O
with	O
some	O
autofocus	O
lenses	O
(	O
the	O
pentax	B-Application
DA	O
and	O
FA	O
lenses	O
that	O
have	O
an	O
MF/AF	O
switch	O
on	O
the	O
lens	O
-	O
see	O
p.112	O
of	O
the	O
K20D	O
manual	O
)	O
.	O
</s>
<s>
The	O
price	O
with	O
a	O
DA	B-Algorithm
18-55mm	I-Algorithm
f/3.5	I-Algorithm
-5.6	I-Algorithm
II	I-Algorithm
lens	O
kit	O
was	O
$699	O
.	O
</s>
<s>
Under	O
a	O
partnership	O
between	O
Pentax	B-Application
and	O
Samsung	B-Application
Techwin	O
,	O
the	O
K20D	O
was	O
also	O
available	O
as	O
the	O
Samsung	B-Algorithm
GX-20	I-Algorithm
.	O
</s>
<s>
In	O
addition	O
,	O
the	O
hand	O
grip	O
is	O
a	O
slightly	O
different	O
shape	O
,	O
meaning	O
that	O
the	O
battery	B-Algorithm
grip	I-Algorithm
for	O
the	O
K20D	O
is	O
incompatible	O
with	O
the	O
GX-20	O
.	O
</s>
<s>
A	O
separate	O
GX-20	O
battery	B-Algorithm
grip	I-Algorithm
was	O
available	O
.	O
</s>
<s>
The	O
firmware	O
of	O
the	O
Samsung	B-Algorithm
GX-20	I-Algorithm
is	O
also	O
different	O
,	O
using	O
different	O
menus	O
and	O
symbols	O
.	O
</s>
<s>
It	O
also	O
lacks	O
support	O
for	O
the	O
Pentax	B-Application
PEF	O
raw	B-Application
image	I-Application
format	I-Application
,	O
reportedly	O
opting	O
for	O
Adobe	O
's	O
raw	B-Application
format	I-Application
instead	O
.	O
</s>
<s>
Samsung	B-Application
based	O
its	O
firmware	O
updates	O
for	O
the	O
GX-20	O
on	O
those	O
Pentax	B-Application
created	O
for	O
the	O
K20D	O
,	O
introducing	O
versions	O
1.01	O
and	O
1.03	O
shortly	O
after	O
Pentax	B-Application
released	O
the	O
corresponding	O
updates	O
for	O
the	O
K20D	O
.	O
</s>
<s>
Samsung	B-Application
ceased	O
update	O
support	O
for	O
the	O
GX-20	O
before	O
Pentax	B-Application
released	O
firmware	O
version	O
1.04	O
for	O
the	O
K20D	O
,	O
and	O
thus	O
did	O
not	O
develop	O
or	O
release	O
a	O
corresponding	O
version	O
1.04	O
for	O
the	O
GX-20	O
.	O
</s>
<s>
Pentax	B-Application
K20D	O
firmware	O
updates	O
cannot	O
be	O
installed	O
on	O
the	O
GX-20	O
.	O
</s>
