<s>
The	O
Sony	B-Algorithm
FE	I-Algorithm
90mm	I-Algorithm
F2.8	I-Algorithm
Macro	I-Algorithm
G	I-Algorithm
OSS	I-Algorithm
is	O
a	O
full-frame	O
macro	O
prime	O
lens	O
for	O
the	O
Sony	B-Algorithm
E-mount	I-Algorithm
,	O
announced	O
by	O
Sony	O
on	O
4	O
March	O
2015	O
.	O
</s>
<s>
As	O
of	O
June	O
2017	O
,	O
the	O
90mm	O
Macro	O
lens	O
is	O
one	O
of	O
only	O
3	O
E-mount	B-Algorithm
lenses	I-Algorithm
manufactured	O
by	O
Sony	O
that	O
are	O
specifically	O
designed	O
for	O
macro	O
photography	O
,	O
with	O
the	O
others	O
being	O
the	O
Sony	O
FE	O
50mm	O
F2.8	O
Macro	O
and	O
Sony	B-Algorithm
E	I-Algorithm
30mm	I-Algorithm
F3.5	I-Algorithm
Macro	I-Algorithm
lenses	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
this	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
producing	O
a	O
field-of-view	O
equivalent	O
on	O
full	B-Algorithm
frame	I-Algorithm
of	O
135mm	O
.	O
</s>
<s>
The	O
lens	O
is	O
currently	O
the	O
only	O
Sony	B-Algorithm
E-mount	I-Algorithm
lens	I-Algorithm
to	O
feature	O
an	O
external	O
focusing	O
ring	O
,	O
which	O
can	O
be	O
pulled	O
up	O
or	O
down	O
relative	O
to	O
the	O
lens	O
body	O
to	O
switch	O
quickly	O
between	O
manual	O
and	O
autofocus	O
.	O
</s>
<s>
The	O
lens	O
 '	O
autofocus	O
motor	O
is	O
fast	O
and	O
accurate	O
on	O
all	O
Sony	B-Algorithm
E-mount	I-Algorithm
cameras	O
,	O
with	O
only	O
mild	O
hunting	O
when	O
shooting	O
at	O
its	O
closest	O
focusing	O
distance	O
in	O
low-light	O
situations	O
.	O
</s>
