<s>
The	O
Nikon	B-Algorithm
24-70mm	I-Algorithm
f/2.8G	I-Algorithm
ED	I-Algorithm
AF-S	I-Algorithm
lens	O
was	O
announced	O
in	O
2007	O
by	O
Nikon	B-Algorithm
,	O
in	O
Japan	O
.	O
</s>
<s>
It	O
is	O
a	O
dust	O
-	O
and	O
moisture-resistant	O
professional	O
wide-angle	O
to	O
short-telephoto	O
high-performance	O
zoom	O
,	O
featuring	O
internal	O
focusing	O
with	O
constant	O
aperture	B-General_Concept
of	O
f/2.8	O
throughout	O
the	O
focal	O
range	O
,	O
closest	O
focusing	O
distance	O
of	O
0.38m/0.9ft	O
with	O
a	O
filter	O
size	O
of	O
77mm	O
and	O
a	O
Silent	O
Wave	O
Motor	O
for	O
quiet	O
auto-focusing	O
.	O
</s>
<s>
AF	O
15px|Yes	O
Yes	O
Maximum	O
aperture	B-General_Concept
2.8	O
Minimum	O
aperture22	O
Weight900g	O
Dimensions	O
(	O
Approx	O
.	O
)	O
</s>
