<s>
The	O
Sony	O
FE	O
70-200mm	O
F4.0	O
G	O
OSS	O
is	O
a	O
full-frame	O
constant	O
maximum	O
aperture	B-General_Concept
,	O
telephoto	O
zoom	O
lens	O
for	O
the	O
Sony	B-Algorithm
E-mount	I-Algorithm
,	O
announced	O
by	O
Sony	O
in	O
2013	O
.	O
</s>
<s>
The	O
70-200mm	O
F4.0	O
G	O
lens	O
is	O
popular	O
among	O
weight-sensitive	O
landscape	O
photographers	O
and	O
hobbyists	O
who	O
want	O
G-lens	O
quality	O
without	O
spending	O
thousands	O
of	O
dollars	O
on	O
a	O
heavier	O
,	O
faster	O
aperture	B-General_Concept
telephoto	O
lens	O
.	O
</s>
<s>
Though	O
designed	O
for	O
Sony	O
's	O
full	B-Algorithm
frame	I-Algorithm
E-mount	O
cameras	O
,	O
the	O
lens	O
can	O
be	O
used	O
on	O
Sony	O
's	O
APS-C	B-Algorithm
E-mount	O
camera	O
bodies	O
,	O
with	O
an	O
equivalent	O
full-frame	O
field-of-view	O
of	O
105-300mm	O
.	O
</s>
<s>
On	O
the	O
side	O
of	O
the	O
lens	O
is	O
a	O
set	O
of	O
external	O
controls	O
for	O
enabling	O
image	O
stabilization	O
,	O
limiting	B-Algorithm
the	I-Algorithm
focal	I-Algorithm
range	I-Algorithm
of	I-Algorithm
the	I-Algorithm
lens	I-Algorithm
,	O
and	O
changing	O
focusing	O
modes	O
.	O
</s>
<s>
The	O
lens	O
is	O
exceptionally	O
sharp	O
throughout	O
its	O
zoom	O
range	O
,	O
with	O
only	O
a	O
slight	O
fall-off	O
in	O
acuity	O
toward	O
the	O
edges	O
of	O
the	O
frame	O
at	O
faster	O
apertures	B-General_Concept
.	O
</s>
