<s>
With	O
its	O
extreme	O
focal	B-Algorithm
length	I-Algorithm
of	O
300millimetres	O
it	O
is	O
the	O
refracting	O
prime	O
lens	O
with	O
the	O
longest	O
focal	B-Algorithm
length	I-Algorithm
of	O
the	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
system	I-Operating_System
(	O
end	O
of	O
2020	O
)	O
.	O
</s>
<s>
M.Zuiko	O
Digital	O
lenses	O
are	O
offered	O
as	O
exchangeable	O
lenses	O
for	O
the	O
Micro	B-Operating_System
Four	I-Operating_System
Thirds	I-Operating_System
system	I-Operating_System
(	O
MFT	B-Operating_System
)	O
.	O
</s>
<s>
The	O
lens	O
has	O
six	O
times	O
normal	O
focal	B-Algorithm
length	I-Algorithm
and	O
17	O
lenses	O
in	O
10	O
groups	O
which	O
give	O
a	O
diagonal	O
angle	O
of	O
view	O
of	O
4.1	O
°	O
.	O
</s>
<s>
Due	O
to	O
the	O
large	O
focal	B-Algorithm
length	I-Algorithm
and	O
its	O
toughness	O
the	O
lens	O
is	O
suitable	O
for	O
wildlife	O
photography	O
and	O
sports	O
photography	O
,	O
but	O
it	O
does	O
not	O
offer	O
zooming	O
such	O
as	O
the	O
Panasonic	B-Device
Leica	I-Device
DG	I-Device
Vario-Elmar	I-Device
100-400	I-Device
mm	I-Device
.	O
</s>
<s>
Compared	O
to	O
other	O
camera	O
systems	O
with	O
differing	O
normal	O
focal	B-Algorithm
lengths	I-Algorithm
,	O
and	O
therefore	O
different	O
image	B-Algorithm
sensor	I-Algorithm
sizes	I-Algorithm
,	O
the	O
following	O
equivalent	O
values	O
apply	O
to	O
lenses	O
with	O
appropriate	O
properties	O
as	O
the	O
M.Zuiko	O
300mm	O
f/4	O
within	O
the	O
Micro-Four-Thirds	O
system	O
(	O
MFT	B-Operating_System
)	O
.	O
</s>
