<s>
It	O
was	O
used	O
on	O
analog	O
half-frame	O
compact	O
and	O
SLR	B-Algorithm
models	O
from	O
1959	O
until	O
the	O
early	O
1980s	O
.	O
</s>
<s>
In	O
2009	O
,	O
Olympus	O
released	O
the	O
PEN	O
E-P1	B-Algorithm
,	O
a	O
digital	O
mirrorless	B-Device
interchangeable-lens	I-Device
camera	I-Device
,	O
which	O
opened	O
the	O
range	O
of	O
Digital	O
PEN	O
models	O
,	O
which	O
are	O
still	O
sold	O
today	O
.	O
</s>
<s>
In	O
1966	O
the	O
arrival	O
of	O
the	O
Rollei	B-Algorithm
35	I-Algorithm
,	O
a	O
camera	O
almost	O
as	O
compact	O
but	O
making	O
normal	O
24×36	O
exposures	O
,	O
would	O
announce	O
the	O
beginning	O
of	O
the	O
end	O
for	O
the	O
half-frame	O
concept	O
.	O
</s>
<s>
It	O
is	O
a	O
true	O
point	B-Algorithm
and	I-Algorithm
shoot	I-Algorithm
camera	I-Algorithm
,	O
and	O
has	O
a	O
28mm	O
f/3.5	O
lens	O
.	O
</s>
<s>
The	O
Pen	O
EE.2	O
,	O
produced	O
from	O
1968	O
to	O
1977	O
,	O
is	O
nearly	O
the	O
same	O
as	O
the	O
Pen	O
EE	O
with	O
the	O
addition	O
of	O
a	O
hot	B-Algorithm
shoe	I-Algorithm
.	O
</s>
<s>
The	O
Pen	O
EE.S2	O
,	O
produced	O
from	O
1968	O
to	O
1971	O
,	O
is	O
the	O
same	O
as	O
the	O
Pen	O
EE.S	O
with	O
the	O
addition	O
of	O
a	O
hot	B-Algorithm
shoe	I-Algorithm
.	O
</s>
<s>
The	O
Pen	O
EE.D	O
,	O
produced	O
from	O
1967	O
to	O
1972	O
,	O
is	O
a	O
more	O
expensive	O
automated-exposure	O
model	O
,	O
with	O
a	O
CdS	O
meter	O
,	O
a	O
32mm	O
f/1.7	O
lens	O
and	O
a	O
hot	B-Algorithm
shoe	I-Algorithm
.	O
</s>
<s>
It	O
only	O
exists	O
in	O
black	O
finish	O
,	O
and	O
has	O
a	O
cold	O
flash	B-Algorithm
shoe	I-Algorithm
.	O
</s>
<s>
The	O
Olympus	B-Algorithm
PEN	I-Algorithm
F	I-Algorithm
series	O
of	O
cameras	O
were	O
half-frame	O
SLR	B-Algorithm
cameras	I-Algorithm
produced	O
between	O
1963	O
and	O
1970	O
.	O
</s>
<s>
The	O
Digital	O
PEN	O
series	O
is	O
a	O
wide	O
range	O
of	O
mirrorless	B-Device
interchangeable	I-Device
lens	I-Device
digital	I-Device
cameras	I-Device
made	O
by	O
Olympus	O
.	O
</s>
<s>
They	O
use	O
the	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
system	I-Operating_System
,	O
so	O
they	O
all	O
have	O
a	O
17.3	B-Algorithm
x	I-Algorithm
13	I-Algorithm
mm	I-Algorithm
Four	I-Algorithm
Thirds	I-Algorithm
size	I-Algorithm
image	B-Algorithm
sensor	I-Algorithm
and	O
autofocus	O
.	O
</s>
<s>
The	O
first	O
digital	O
PEN	O
was	O
the	O
E-P1	B-Algorithm
,	O
released	O
in	O
June	O
2009	O
.	O
</s>
<s>
Main	O
PEN	O
range	O
:	O
The	O
Olympus	B-Algorithm
PEN	I-Algorithm
E-P1	I-Algorithm
was	O
the	O
first	O
digital	O
PEN	O
and	O
the	O
second	O
camera	O
in	O
the	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
It	O
revolutionized	O
the	O
camera	O
market	O
,	O
because	O
it	O
was	O
the	O
first	O
mirrorless	B-Device
camera	I-Device
which	O
really	O
took	O
advantage	O
of	O
its	O
kind	O
.	O
</s>
<s>
It	O
included	O
a	O
12	O
MP	O
Four	B-Architecture
Thirds	I-Architecture
size	O
sensor	O
,	O
which	O
had	O
the	O
same	O
image	O
quality	O
as	O
a	O
Four	B-Architecture
Thirds	I-Architecture
DSLR	B-Device
camera	I-Device
,	O
but	O
was	O
packed	O
in	O
a	O
much	O
smaller	O
body	O
.	O
</s>
<s>
The	O
next	O
model	O
in	O
this	O
category	O
was	O
the	O
E-P2	B-Algorithm
,	O
released	O
in	O
April	O
2010	O
,	O
which	O
did	O
not	O
include	O
a	O
whole	O
lot	O
of	O
new	O
features	O
.	O
</s>
<s>
One	O
of	O
them	O
was	O
the	O
multi-functional	O
accessory	O
port	O
under	O
the	O
hot	B-Algorithm
shoe	I-Algorithm
for	O
an	O
optional	O
external	O
electronic	B-Algorithm
viewfinder	I-Algorithm
or	O
an	O
external	O
microphone	B-Application
.	O
</s>
<s>
It	O
packed	O
quite	O
a	O
few	O
new	O
features	O
like	O
1080p	O
video	O
recording	O
,	O
a	O
built-in	O
flash	O
,	O
or	O
a	O
touch	B-Device
screen	I-Device
.	O
</s>
<s>
The	O
next	O
model	O
in	O
this	O
range	O
was	O
the	O
E-P5	B-Algorithm
from	O
2013	O
.	O
</s>
<s>
It	O
got	O
some	O
of	O
its	O
new	O
features	O
from	O
the	O
more	O
professional	O
OM-D	B-Algorithm
E-M5	I-Algorithm
,	O
like	O
the	O
new	O
16	O
MP	O
sensor	O
and	O
along	O
with	O
it	O
,	O
the	O
5-axis	O
sensor	O
stabilization	O
system	O
,	O
and	O
a	O
tilting	O
LCD	B-Device
screen	I-Device
.	O
</s>
<s>
shutter	O
speed	O
of	O
1/8000s	O
,	O
which	O
was	O
a	O
whole	O
new	O
feature	O
in	O
Olympus	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
cameras	O
.	O
</s>
<s>
They	O
skipped	O
the	O
number	O
6	O
,	O
and	O
named	O
the	O
camera	O
E-P7	B-Algorithm
.	O
</s>
<s>
The	O
E-P7	B-Algorithm
shares	O
a	O
lot	O
of	O
its	O
internals	O
with	O
the	O
OM-D	B-Algorithm
E-M10	I-Algorithm
Mark	I-Algorithm
IV	I-Algorithm
,	O
but	O
the	O
design	O
resembles	O
the	O
PEN-F	B-Algorithm
.	O
</s>
<s>
It	O
lacks	O
an	O
electronic	B-Algorithm
viewfinder	I-Algorithm
,	O
like	O
the	O
previous	O
E-P	O
models	O
.	O
</s>
<s>
PEN	O
Lite	O
range	O
:	O
The	O
Olympus	B-Algorithm
PEN	I-Algorithm
Lite	O
range	O
started	O
off	O
with	O
the	O
E-PL1	B-Algorithm
.	O
</s>
<s>
It	O
was	O
released	O
one	O
month	O
after	O
the	O
E-P2	B-Algorithm
as	O
a	O
cheaper	O
,	O
more	O
beginner	O
friendly	O
option	O
.	O
</s>
<s>
Their	O
main	O
features	O
were	O
identical	O
,	O
like	O
the	O
12	O
MP	O
image	B-Algorithm
sensor	I-Algorithm
,	O
or	O
the	O
3-axis	O
sensor	O
stabilization	O
system	O
.	O
</s>
<s>
The	O
E-PL1	B-Algorithm
had	O
a	O
fastest	O
shutter	O
speed	O
of	O
1/2000s	O
instead	O
of	O
1/4000s	O
,	O
a	O
little	O
bit	O
smaller	O
LCD	B-Device
screen	I-Device
(	O
2.7	O
"	O
vs	O
3	O
"	O
)	O
and	O
less	O
premium	O
material	O
usage	O
.	O
</s>
<s>
The	O
next	O
model	O
was	O
the	O
E-PL2	B-Algorithm
(	O
2011	O
Q1	O
)	O
,	O
with	O
a	O
bigger	O
and	O
higher	O
resolution	O
LCD	B-Device
screen	I-Device
,	O
then	O
the	O
E-PL3	B-Algorithm
(	O
2011	O
Q4	O
)	O
,	O
with	O
a	O
higher	O
,	O
6	O
fps	O
burst	O
rate	O
.	O
</s>
<s>
The	O
E-PL5	B-Algorithm
was	O
the	O
first	O
PEN	O
Lite	O
model	O
to	O
include	O
the	O
E-M5	B-Algorithm
'	O
s	O
16	O
MP	O
sensor	O
,	O
but	O
maintaining	O
the	O
3-axis	O
image	O
stabilization	O
from	O
the	O
older	O
cameras	O
.	O
</s>
<s>
The	O
E-PL6	B-Algorithm
(	O
2014	O
Q3	O
)	O
was	O
not	O
a	O
very	O
innovative	O
model	O
with	O
the	O
only	O
new	O
feature	O
being	O
the	O
time	O
lapse	O
recording	O
capability	O
compared	O
to	O
the	O
E-PL5	B-Algorithm
.	O
</s>
<s>
The	O
E-PL7	B-Algorithm
was	O
actually	O
announced	O
one	O
month	O
later	O
with	O
a	O
design	O
change	O
,	O
built-in	O
Wi-Fi	O
and	O
a	O
selfie-friendly	O
higher	O
resolution	O
LCD	B-Device
screen	I-Device
.	O
</s>
<s>
The	O
E-PL8	O
from	O
Q4	O
2016	O
ran	O
with	O
little	O
development	O
:	O
the	O
only	O
major	O
difference	O
between	O
the	O
E-PL7	B-Algorithm
and	O
the	O
E-PL8	O
was	O
the	O
design	O
.	O
</s>
<s>
ISO	O
sensitivity	O
was	O
cut	O
back	O
from	O
25,600	O
to	O
6,400	O
;	O
however	O
,	O
it	O
packed	O
4K	B-Architecture
video	I-Architecture
recording	O
and	O
reintroduced	O
the	O
built-in	O
flash	O
in	O
the	O
PEN	O
Lite	O
range	O
.	O
</s>
<s>
PEN	O
Mini	O
range	O
:	O
The	O
Olympus	B-Algorithm
PEN	I-Algorithm
Mini	O
was	O
a	O
short-lived	O
category	O
in	O
the	O
digital	O
PEN	O
range	O
.	O
</s>
<s>
The	O
first	O
model	O
in	O
it	O
was	O
the	O
E-PM1	B-Algorithm
,	O
released	O
in	O
Q4	O
2011	O
.	O
</s>
<s>
It	O
had	O
the	O
same	O
features	O
and	O
the	O
same	O
size	O
as	O
the	O
E-PL3	B-Algorithm
,	O
but	O
with	O
a	O
simplified	O
button	O
layout	O
and	O
ergonomics	O
.	O
</s>
<s>
The	O
E-PM2	O
was	O
released	O
in	O
Q2	O
2013	O
,	O
it	O
had	O
the	O
same	O
differences	O
compared	O
to	O
the	O
E-PL5	B-Algorithm
.	O
</s>
<s>
It	O
is	O
the	O
digital	O
PEN-F	B-Algorithm
from	O
2016	O
.	O
</s>
<s>
It	O
pays	O
tribute	O
to	O
the	O
above	O
mentioned	O
old	O
PEN	B-Algorithm
F	I-Algorithm
half-frame	O
SLR	B-Algorithm
.	O
</s>
<s>
The	O
new	O
PEN-F	B-Algorithm
shares	O
a	O
lot	O
of	O
its	O
features	O
with	O
the	O
Olympus	B-Algorithm
OM-D	I-Algorithm
E-M5	I-Algorithm
Mark	I-Algorithm
II	I-Algorithm
,	O
and	O
also	O
has	O
a	O
built-in	O
electronic	B-Algorithm
viewfinder	I-Algorithm
,	O
which	O
is	O
a	O
unique	O
feature	O
among	O
digital	O
PEN	O
cameras	O
.	O
</s>
<s>
The	O
PEN-F	B-Algorithm
was	O
also	O
the	O
first	O
Olympus	O
camera	O
to	O
use	O
the	O
new	O
,	O
20	O
MP	O
sensor	O
,	O
which	O
later	O
ended	O
up	O
in	O
professional	O
bodies	O
like	O
the	O
E-M1	B-Algorithm
Mark	I-Algorithm
II	I-Algorithm
.	O
</s>
