<s>
The	O
Ricoh	B-Device
GXR	I-Device
is	O
a	O
compact	O
digital	B-Device
camera	I-Device
first	O
announced	O
by	O
Ricoh	O
Company	O
,	O
Ltd	O
,	O
Tokyo	O
on	O
November	O
10	O
,	O
2009	O
.	O
</s>
<s>
Unlike	O
conventional	O
cameras	O
which	O
either	O
have	O
a	O
fixed	O
lens	O
and	O
sensor	B-Algorithm
or	O
interchangeable	O
lens	O
and	O
a	O
fixed	O
sensor	B-Algorithm
,	O
the	O
GXR	O
takes	O
interchangeable	O
units	O
,	O
each	O
housing	O
a	O
lens	O
,	O
sensor	B-Algorithm
and	O
image	B-General_Concept
processing	I-General_Concept
engine	I-General_Concept
.	O
</s>
<s>
This	O
allows	O
each	O
unit	O
to	O
have	O
these	O
features	O
optimised	O
to	O
one	O
another	O
and	O
a	O
specific	O
task	O
,	O
whereas	O
with	O
conventional	O
interchangeable	O
lens	O
cameras	O
,	O
each	O
different	O
lens	O
must	O
use	O
the	O
same	O
sensor	B-Algorithm
and	O
engine	O
.	O
</s>
<s>
The	O
sealed	O
units	O
also	O
prevent	O
dust	O
from	O
reaching	O
the	O
sensor	B-Algorithm
,	O
which	O
can	O
be	O
a	O
problem	O
with	O
other	O
cameras	O
where	O
the	O
sensor	B-Algorithm
is	O
exposed	O
whilst	O
a	O
lens	O
is	O
being	O
changed	O
.	O
</s>
<s>
A	O
significant	O
disadvantage	O
of	O
this	O
system	O
is	O
the	O
extra	O
cost	O
involved	O
in	O
having	O
to	O
buy	O
a	O
whole	O
new	O
sensor	B-Algorithm
with	O
every	O
new	O
lens	O
.	O
</s>
<s>
The	O
body	O
holds	O
a	O
built-in	O
pop-up	O
flash	O
as	O
well	O
as	O
a	O
hot	B-Algorithm
shoe	I-Algorithm
on	O
top	O
for	O
an	O
external	O
flash	O
unit	O
.	O
</s>
<s>
Alternatively	O
,	O
Ricoh	O
's	O
'	O
VF-2	O
'	O
,	O
an	O
external	O
electronic	O
viewfinder	O
,	O
can	O
be	O
attached	O
to	O
the	O
hot	B-Algorithm
shoe	I-Algorithm
which	O
,	O
offers	O
920,000	O
pixels	O
and	O
100%	O
field	O
of	O
view	O
.	O
</s>
<s>
Each	O
lens	O
unit	O
has	O
its	O
own	O
unique	O
specifications	O
relating	O
to	O
its	O
sensor	B-Algorithm
and	O
optics	O
,	O
meaning	O
that	O
different	O
lens	O
units	O
will	O
change	O
the	O
features	O
,	O
behavior	O
and	O
performance	O
of	O
the	O
camera	O
body	O
to	O
varying	O
degrees	O
when	O
attached	O
.	O
</s>
<s>
+Interchangeable	O
Module	O
Specifications	O
A12	O
28mm	O
A12	O
50mm	O
A16	O
24-85mm	O
P10	O
S10	O
GXR	O
Mount	O
(	O
Leica	B-Algorithm
M	I-Algorithm
)	O
Unit	O
Name	O
GR	O
LENS	O
A12	O
28mm	O
F2.5	O
GR	O
LENS	O
A12	O
50mm	O
F2.5	O
MACRO	O
RICOH	O
LENS	O
A16	O
24-85mm	O
F3.5-5.5	O
RICOH	O
LENS	O
P10	O
28-300mm	O
F3.5-5.6	O
VC	O
RICOH	O
LENS	O
S10	O
24-72mm	O
F2.5-4.4	O
VC	O
GXR	O
MOUNT	O
A12	O
Million	O
Pixels	O
(	O
Effective/Total	O
)	O
12.3/12.9	O
16.2/16.5	O
10.0/10.6	O
10.0/10.4	O
12.3/12.9	O
Image	O
SensorCMOS	O
,	O
APS-C( )	O
CMOS	O
,	O
1/2.3	O
"	O
CCD	B-Algorithm
,	O
1/1.7	O
"	O
CMOS	O
,	O
APS-C	B-Algorithm
Focal	O
Length	O
(	O
35mm	O
equivalent	O
)	O
f	O
=	O
18.3mm	O
(	O
28mm	O
)	O
f	O
=	O
33mm	O
(	O
50mm	O
)	O
f	O
=	O
15.7	O
~	O
55.7mm	O
(	O
24	O
~	O
85mm	O
)	O
f	O
=	O
4.9	O
~	O
52.5mm	O
(	O
28	O
~	O
300mm	O
)	O
f	O
=	O
5.1	O
~	O
15.3mm	O
(	O
24	O
~	O
72mm	O
)	O
4.0mm	O
(	O
19mm	O
)	O
with	O
DW-628.8mm	O
(	O
135mm	O
)	O
with	O
TC-1	O
varies	O
Max	O
.	O
</s>
