<s>
The	O
Olympus	B-Algorithm
E-400	I-Algorithm
is	O
a	O
digital	B-Device
single-lens	I-Device
reflex	I-Device
camera	I-Device
launched	O
by	O
Olympus	O
on	O
14	O
September	O
2006	O
,	O
using	O
the	O
Four	B-Architecture
Thirds	I-Architecture
System	I-Architecture
lens	O
mount	O
standard	O
.	O
</s>
<s>
This	O
10	O
megapixel	O
camera	O
could	O
be	O
compared	O
to	O
other	O
DSLRs	B-Device
unveiled	O
during	O
the	O
summer	O
of	O
2006	O
with	O
comparable	O
pixel	O
count	O
and	O
price	O
range	O
:	O
the	O
Sony	B-Algorithm
α	I-Algorithm
100	O
,	O
the	O
Nikon	B-Algorithm
D80	I-Algorithm
,	O
the	O
Canon	B-Algorithm
EOS	I-Algorithm
400D	I-Algorithm
and	O
the	O
Pentax	B-Algorithm
K10D	I-Algorithm
.	O
</s>
<s>
The	O
E-400	B-Algorithm
is	O
notable	O
for	O
its	O
small	O
size	O
,	O
omitting	O
the	O
hand	O
grip	O
and	O
exploiting	O
the	O
smaller	O
sensor	O
.	O
</s>
<s>
It	O
weighs	O
only	O
375g	O
and	O
approaches	O
manual	O
focus	O
film	O
SLRs	O
sizes	O
,	O
reminiscent	O
of	O
the	O
Olympus	B-Algorithm
OM	I-Algorithm
system	I-Algorithm
.	O
</s>
<s>
The	O
E-400	B-Algorithm
,	O
like	O
all	O
of	O
the	O
Olympus	O
E-system	O
cameras	O
,	O
uses	O
Olympus	O
 '	O
patented	O
Supersonic	O
Wave	O
Filter	O
dust	O
reduction	O
system	O
to	O
shake	O
dust	O
from	O
the	O
sensor	O
during	O
startup	O
and	O
when	O
requested	O
by	O
the	O
user	O
;	O
this	O
largely	O
eliminates	O
the	O
problem	O
of	O
dust	O
accumulation	O
on	O
the	O
surface	O
of	O
the	O
image	O
sensor	O
.	O
</s>
<s>
The	O
E-400	B-Algorithm
was	O
controversial	O
because	O
Olympus	O
only	O
marketed	O
it	O
in	O
Europe	O
.	O
</s>
<s>
The	O
rest	O
of	O
the	O
world	O
had	O
to	O
wait	O
for	O
the	O
E-410	B-Algorithm
,	O
which	O
did	O
not	O
arrive	O
until	O
the	O
spring	O
of	O
2007	O
and	O
did	O
not	O
include	O
the	O
same	O
Kodak	O
sensor	O
as	O
the	O
E-400	B-Algorithm
.	O
</s>
<s>
The	O
E-410	B-Algorithm
replaced	O
the	O
Kodak	O
sensor	O
with	O
the	O
Panasonic	O
sensor	O
.	O
</s>
