<s>
The	O
Panasonic	O
Lumix	O
G	O
20mm	O
1.7	O
lens	O
is	O
a	O
pancake-style	O
prime	O
lens	O
for	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
system	I-Operating_System
cameras	O
.	O
</s>
<s>
In	O
the	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
format	O
,	O
it	O
is	O
slightly	O
wider	O
than	O
normal	O
.	O
</s>
<s>
The	O
46mm	O
thread	O
lets	O
a	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
user	O
share	O
filters	O
between	O
it	O
,	O
the	O
Panasonic	B-Algorithm
14mm	I-Algorithm
,	O
Panasonic	O
Leica	O
25mm	O
,	O
and	O
Panasonic	B-Algorithm
Leica	I-Algorithm
45mm	I-Algorithm
lenses	O
.	O
</s>
<s>
It	O
is	O
believed	O
that	O
this	O
is	O
due	O
to	O
interaction	O
between	O
the	O
aperture	O
stepper	O
motor	O
on	O
the	O
lens	O
and	O
the	O
Sony	O
16MP	O
sensor	O
used	O
on	O
many	O
Micro	B-Operating_System
4/3	I-Operating_System
cameras	O
.	O
</s>
