<s>
The	O
EF	B-Application
70	O
–	O
200mm	O
lenses	O
are	O
a	O
group	O
of	O
telephoto	O
zoom	O
full-frame	B-Algorithm
lenses	O
made	O
by	O
Canon	O
.	O
</s>
<s>
The	O
lenses	O
have	O
an	O
EF	B-Application
mount	I-Application
to	O
work	O
with	O
the	O
EOS	B-Algorithm
line	O
of	O
cameras	O
.	O
</s>
<s>
The	O
lens	O
comes	O
in	O
seven	O
different	O
versions	O
,	O
all	O
of	O
which	O
have	O
fixed	O
maximum	O
aperture	B-General_Concept
at	O
all	O
focal	B-Algorithm
lengths	I-Algorithm
,	O
and	O
are	O
L-series	O
lenses	O
.	O
</s>
<s>
Some	O
portrait	O
photographers	O
also	O
prefer	O
this	O
lens	O
because	O
the	O
fast	O
aperture	B-General_Concept
produces	O
more	O
background	O
blur	O
and	O
bokeh	O
.	O
</s>
<s>
The	O
non-IS	O
f/2.8	O
version	O
was	O
released	O
in	O
1995	O
and	O
replaced	O
the	O
EF	B-Algorithm
80	I-Algorithm
–	I-Algorithm
200mm	I-Algorithm
f/2.8L	I-Algorithm
.	O
</s>
<s>
The	O
lenses	O
use	O
nine	O
-	O
or	O
eight-bladed	O
,	O
circular	O
diaphragms	O
which	O
maintain	O
a	O
nearly	O
circular	O
aperture	B-General_Concept
when	O
stopped	O
down	O
.	O
</s>
<s>
The	O
f/2.8	O
and	O
f/4.0	O
image-stabilized	O
versions	O
also	O
feature	O
weather	O
sealing	O
when	O
mated	O
to	O
a	O
weather-sealed	O
camera	O
to	O
such	O
as	O
the	O
Canon	B-Algorithm
EOS	I-Algorithm
1D-series	O
bodies	O
.	O
</s>
<s>
These	O
lenses	O
are	O
compatible	O
with	O
the	O
Canon	B-Algorithm
Extender	I-Algorithm
EF	I-Algorithm
teleconverters	O
.	O
</s>
<s>
When	O
used	O
with	O
a	O
Canon	O
APS-C	O
(	O
1.6x	O
crop	O
)	O
DSLR	O
camera	O
or	O
APS-H	O
(	O
1.3x	O
crop	O
)	O
,	O
the	O
35-mm-equivalent	O
focal	B-Algorithm
lengths	I-Algorithm
of	O
these	O
lenses	O
are	O
112	O
–	O
320mm	O
on	O
an	O
APS-C	O
sensor	O
and	O
91	O
–	O
260mm	O
on	O
an	O
APS-H	O
sensor	O
.	O
</s>
<s>
Attribute	O
f/2.8L	O
IS	O
III	O
USM	O
f/2.8L	O
IS	O
II	O
USM	O
f/2.8L	O
IS	O
USM	O
f/2.8L	O
USM	O
f/4L	O
IS	O
II	O
USM	O
f/4L	O
IS	O
USM	O
f/4L	O
USM	O
Image300x200px300x200px300x200px300x200px300x200px300x200pxKey	O
features	O
Image	O
stabilizer	O
15px|Yes	O
Yes	O
,	O
3rd	O
generation	O
(	O
3.5	O
stops	O
)	O
15px|Yes	O
Yes	O
,	O
3rd	O
generation	O
(	O
3.5	O
stops	O
)	O
15px|Yes	O
Yes	O
,	O
2nd	O
generation	O
(	O
3	O
stops	O
)	O
15px|No	O
No	O
15px|Yes	O
Yes	O
,	O
4th	O
generation	O
(	O
5	O
stops	O
)	O
15px|Yes	O
Yes	O
,	O
3rd	O
generation	O
(	O
4	O
stops	O
)	O
15px|No	O
No	O
Environmental	O
Sealing	O
15px|Yes	O
Yes	O
15px|No	O
No	O
15px|Yes	O
Yes	O
15px|No	O
No	O
Ultrasonic	O
Motor	O
15px|Yes	O
Yes	O
L-series	O
15px|Yes	O
Yes	O
Diffractive	O
Optics	O
15px|No	O
No	O
Macro	O
15px|No	O
NoTechnical	O
data	O
Maximum	O
aperture	B-General_Concept
f/2.8	O
f/4.0	O
Minimum	O
aperture	B-General_Concept
f/32	O
Horizontal	O
viewing	O
angle	O
29°	O
–	O
10°	O
Vertical	O
viewing	O
angle	O
19°30	O
 '	O
–	O
7°	O
Diagonal	O
viewing	O
angle	O
34°	O
–	O
12°	O
Groups/elements	O
19/23	O
18/23	O
15/18	O
15/20	O
13/16	O
#	O
of	O
diaphragm	O
blades	O
8	O
circular	O
aperture	B-General_Concept
8	O
9	O
circular	O
aperture	B-General_Concept
8	O
Closest	O
focusing	O
distance	O
Maximum	O
Magnification.21	O
×	O
.17	O
×	O
.16	O
×	O
.27	O
×	O
.21	O
×Physical	O
data	O
Weight	O
Maximum	O
diameter	O
Length	O
Filter	O
diameter	O
77	O
mm	O
72	O
mm	O
67	O
mmAccessories	O
Lens	O
hood	O
Tulip-shaped	O
(	O
ET-87	O
)	O
Tulip-shaped	O
(	O
ET-86	O
)	O
Tulip-shaped	O
(	O
ET-83II	O
)	O
ET-78B	O
Cylindrical	O
(	O
ET-74	O
)	O
Retail	O
information	O
Release	O
date	O
August	O
2018	O
April	O
2010	O
September	O
2001	O
March	O
1995	O
June	O
2018	O
November	O
2006	O
September	O
1999	O
Currently	O
in	O
production	O
?	O
</s>
