<s>
The	O
Olympus	B-Algorithm
E-330	I-Algorithm
is	O
a	O
DSLR	B-Device
launched	O
on	O
30	O
January	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>
Its	O
main	O
feature	O
is	O
its	O
live	B-Device
image	I-Device
preview	I-Device
functionality	O
,	O
permitting	O
an	O
image	O
to	O
be	O
previewed	O
on	O
the	O
LCD	B-Device
screen	I-Device
.	O
</s>
<s>
While	O
live	B-Device
image	I-Device
preview	I-Device
is	O
not	O
new	O
in	O
compact	O
digital	O
cameras	O
,	O
the	O
E-330	B-Algorithm
is	O
significant	O
because	O
it	O
was	O
the	O
first	O
digital	B-Device
SLR	I-Device
to	O
offer	O
this	O
feature	O
.	O
</s>
<s>
Unlike	O
many	O
other	O
digital	B-Device
SLRs	I-Device
,	O
the	O
E-330	B-Algorithm
used	O
a	O
second	O
sensor	O
in	O
the	O
viewfinder	O
chamber	O
which	O
was	O
fed	O
by	O
splitting	O
20%	O
of	O
the	O
light	O
from	O
the	O
viewfinder	O
.	O
</s>
<s>
This	O
mode	O
is	O
known	O
as	O
Live	B-Device
Preview	I-Device
A	O
.	O
</s>
<s>
The	O
E-330	B-Algorithm
also	O
offers	O
a	O
liveview	O
mode	O
using	O
the	O
main	O
sensor	O
known	O
as	O
Live	B-Device
Preview	I-Device
B	O
or	O
Macro	O
Live	B-Device
Preview	I-Device
;	O
however	O
on	O
initial	O
release	O
,	O
autofocus	O
in	O
this	O
mode	O
was	O
disabled	O
,	O
but	O
firmware	O
update	O
1.2	O
released	O
on	O
22	O
June	O
2006	O
allowed	O
autofocus	O
to	O
take	O
place	O
on	O
pressing	O
the	O
AEL/AFL	O
button	O
,	O
dropping	O
the	O
mirror	O
briefly	O
to	O
allow	O
AF	O
lock	O
to	O
be	O
acquired	O
.	O
</s>
<s>
Sony	O
have	O
adopted	O
a	O
similar	O
liveview	O
implementation	O
in	O
their	O
digital	B-Device
SLRs	I-Device
which	O
also	O
place	O
a	O
second	O
sensor	O
in	O
the	O
viewfinder	O
chamber	O
although	O
a	O
moving	O
mirror	O
to	O
allow	O
all	O
light	O
to	O
go	O
to	O
this	O
sensor	O
avoids	O
the	O
dark	O
viewfinder	O
problem	O
the	O
e-330	B-Algorithm
suffered	O
from	O
.	O
</s>
<s>
The	O
E-330	B-Algorithm
also	O
offers	O
a	O
7.5-megapixel	O
image	O
sensor	O
,	O
and	O
has	O
an	O
articulated	O
LCD	B-Device
monitor	O
which	O
tilts	O
up	O
and	O
down	O
for	O
waist-level	O
and	O
over-the-head	O
photography	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
interchangeable	O
lens	O
DSLR	B-Device
to	O
offer	O
this	O
feature	O
.	O
</s>
<s>
The	O
E-330	B-Algorithm
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
Panasonic	B-Device
Lumix	I-Device
DMC-L1	I-Device
and	O
the	O
Leica	B-Algorithm
Digilux	I-Algorithm
3	I-Algorithm
are	O
both	O
built	O
using	O
the	O
same	O
basic	O
inner	O
mechanism	O
from	O
the	O
Olympus	B-Algorithm
E-330	I-Algorithm
,	O
and	O
thus	O
also	O
share	O
the	O
live	B-Device
preview	I-Device
function	O
.	O
</s>
<s>
Unlike	O
the	O
E-330	B-Algorithm
however	O
,	O
neither	O
the	O
L1	O
or	O
Digilux	O
3	O
incorporated	O
the	O
second	O
sensor	O
in	O
the	O
viewfinder	O
chamber	O
and	O
could	O
only	O
produce	O
the	O
liveview	O
output	O
from	O
the	O
main	O
sensor	O
.	O
</s>
<s>
However	O
,	O
they	O
were	O
able	O
to	O
use	O
AF	O
on	O
the	O
main	O
sensor	O
by	O
briefly	O
dropping	O
the	O
mirror	O
from	O
their	O
launch	O
,	O
and	O
offered	O
live	O
histogram	O
,	O
live	O
white	O
balance	O
preview	O
and	O
live	O
metering	O
during	O
main	O
sensor	O
Live	B-Device
Preview	I-Device
,	O
which	O
the	O
E-330	B-Algorithm
did	O
not	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
all	O
three	O
manufacturers	O
suggested	O
that	O
the	O
eyepiece	O
should	O
be	O
blocked	O
during	O
main-sensor	O
live	B-Device
preview	I-Device
to	O
prevent	O
light	O
ingress	O
affecting	O
the	O
process	O
,	O
but	O
only	O
the	O
E-330	B-Algorithm
included	O
a	O
built-in	O
eyepiece	O
shutter	O
,	O
operated	O
by	O
a	O
lever	O
next	O
to	O
the	O
eyepiece	O
.	O
</s>
