<s>
The	O
Leica	O
M9	O
is	O
a	O
full-frame	O
digital	O
rangefinder	B-Algorithm
camera	I-Algorithm
from	O
Leica	O
Camera	O
AG	O
.	O
</s>
<s>
It	O
uses	O
an	O
18.5-megapixel	O
Kodak	O
image	B-Algorithm
sensor	I-Algorithm
,	O
and	O
is	O
compatible	O
with	O
almost	O
all	O
M	O
mount	O
lenses	O
.	O
</s>
<s>
The	O
M9	O
uses	O
an	O
18.5-megapixel	O
Kodak	O
(	O
KAF-18500	O
)	O
CCD	B-Algorithm
image	B-Algorithm
sensor	I-Algorithm
that	O
was	O
developed	O
specifically	O
for	O
the	O
camera	O
.	O
</s>
<s>
The	O
M9	O
supports	O
most	O
M-mount	B-Algorithm
lenses	O
—	O
with	O
only	O
a	O
few	O
older	O
models	O
not	O
suitable	O
due	O
to	O
protruding	O
elements	O
of	O
the	O
lens	O
into	O
the	O
camera	O
body	O
.	O
</s>
<s>
The	O
launch	O
(	O
which	O
also	O
introduced	O
the	O
Leica	B-Algorithm
X1	I-Algorithm
and	O
Leica	B-Algorithm
S2	I-Algorithm
models	O
)	O
included	O
a	O
live	O
video	O
webcast	O
,	O
and	O
featured	O
a	O
guest	O
appearance	O
by	O
the	O
musician	O
Seal	O
.	O
</s>
<s>
In	O
2011	O
,	O
Leica	O
verified	O
a	O
malfunction	O
that	O
may	O
prevent	O
the	O
camera	O
from	O
saving	O
images	O
to	O
certain	O
SanDisk	O
cards	O
and	O
issued	O
a	O
firmware	O
update	O
in	O
July	O
2012	O
,	O
that	O
made	O
"	O
further	O
improvements	O
of	O
SD-Card	B-Device
compatibility	O
"	O
.	O
</s>
<s>
The	O
Leica	B-Algorithm
M9-P	I-Algorithm
camera	O
body	O
was	O
announced	O
in	O
2011	O
;	O
it	O
was	O
not	O
intended	O
as	O
a	O
replacement	O
for	O
the	O
M9	O
,	O
however	O
,	O
as	O
the	O
two	O
camera	O
bodies	O
were	O
sold	O
concurrently	O
.	O
</s>
<s>
This	O
is	O
the	O
cheapest	O
model	O
in	O
the	O
Leica	B-Algorithm
M	I-Algorithm
range	O
.	O
</s>
