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PRINCIPLES OF THE LENSTELE CONVERTERS
84.1° 24mm
18.2° 135mm
75.4° 28mm
12.3° 200mm
46.8° 50mm
8.2° 300mm
122° 12mm
34.3° 70mm
5° 500mm
103.7° 17mm
23.3° 105mm
3.1° 800mm
94.5° 20mm
FISHEYE 180° 15mmFISHEYE 180° 8mm
ANGLE OF VIEW AND FOCAL LENGTH
Mounted between the lens
and camera body, a Sigma
tele converter can increase
the focal length by a
factor of 1.4x or 2x. Ideal
for use with APO lenses,
these teleconverters
use advanced coating
technology to suppress
flare and ghosting that are
particularly noticeably in
digital SLR camera images.
Therefore, they can be
attached to APO lenses
with confidence of retaining
full performance. This
offers a convenient solution
when you need greater
focal length in telephoto
photography.
2.0x
EX DG
APO
TELE CONVERTER
1.4x
EX DG
APO
TELE CONVERTER
Supplied with case.
*1: AF-capable from 0.45m (17.7in) to infinity.
*2: AF-capable from 0.52m (20.5in) to infinity.
*3: AF-capable from 0.67m (26.4in) to infinity.
Supplied with case.
What you should know to choose the right lens for your needs.
use a faster shutter speed, or more
easily create defocused bokeh effects,
not to mention providing a brighter
viewfinder image. F-stops represent
focal length divided by effective
aperture diameter.
You can control perspective by
moving nearer or farther from your
subject and then choosing a lens
that frames your subject the way
you want. To compress the distance
between foreground and background,
step back and use a telephoto lens
(or zoom in). To spread out the
background and emphasize distances,
get closer and use a wide-angle
lens (or zoom out). The telephoto
isolates your subject, while the wide-
angle lens includes the subject’s
surroundings.
When you focus on a subject, some
objects in front of and behind the
subject will also be in focus. “Depth
of field” refers to the depth of this
foreground-background distance.
A smaller lens aperture (higher
F-stop), increases depth of field,
bringing more foreground and
background into focus. A larger
aperture (lower F-stop) isolates
your subject with a blurred “bokeh”
foreground and background. Focal
length is also a factor. Telephoto
lenses have less depth of field,
wide-angle lenses have more.
Angle of view is determined by the
focal length of the lens and the size
of the image (sensor or film format)
frame. With a given image size,
changing the focal length will change
the area of the scene that appears in
the photographic image. Expressed
in degrees, this area of the scene
is the angle of view, which in this
catalog, is computed in reference
to the diagonal of image formats
measuring 36mm x 24mm, 20.7mm x
13.8mm and 23.55mm x 15.7mm.
The longer the focal length, the
smaller the angle of view and the
greater the image magnification.
The aperture controls how much light
can be gathered by the lens. The
lower the f-stop (F2.8, F4, F5.6, etc.),
the larger the aperture and the more
light it will transmit to the image
sensor. A so-called “fast” lens (low
f-stop at maximum aperture),
lets you shoot with less illumination,
Angle of View
Aperture, F-stops and
Lens ‘Speed’
Depth of Field
Perspective
F22
F2.8
APO 50-500mm F4.5-6.3 DG OS HSM
APO 70-200mm F2.8 EX DG OS HSM
APO 120-300mm F2.8 EX DG OS HSM
APO 120-400mm F4.5-5.6 DG OS HSM
APO 150-500mm F5-6.3 DG OS HSM
APO 300-800mm F5.6 EX DG HSM
MACRO 105mm F2.8 EX DG OS HSM
APO MACRO 150mm F2.8 EX DG OS HSM
APO MACRO 180mm F2.8 EX DG OS HSM
APO 300mm F2.8 EX DG / HSM
APO 500mm F4.5 EX DG / HSM
APO 800mm F5.6 EX DG HSM
MF
AF
AF
MF
MF
MF
MF
MF
MF
AF
MF
MF
MF
AF
—
MF
MF
—
MF
MF
MF
MF
MF
—
MF
AF
AF
MF
MF
MF
MF
MF
MF
AF
MF
MF
MF
AF
AF
MF
MF
MF
MF
MF
MF
AF
MF
MF
SIGMA Sony Nikon Canon
876401 876623 876555 876272
2.0x Dedicated Lenses
APO 50-500mm F4.5-6.3 DG OS HSM
APO 70-200mm F2.8 EX DG OS HSM
APO 120-300mm F2.8 EX DG OS HSM
APO 120-400mm F4.5-5.6 DG OS HSM
APO 150-500mm F5-6.3 DG OS HSM
APO 300-800mm F5.6 EX DG HSM
MACRO 105mm F2.8 EX DG OS HSM
APO MACRO 150mm F2.8 EX DG OS HSM
APO MACRO 180mm F2.8 EX DG OS HSM
APO 300mm F2.8 EX DG / HSM
APO 500mm F4.5 EX DG / HSM
APO 800mm F5.6 EX DG HSM
MF
AF
AF
MF
MF
MF
AF
*1
AF
*2
AF
*3
AF
MF
MF
MF
AF
—
MF
MF
—
AF
*1
AF
*2
AF
*3
MF
MF
—
MF
AF
AF
MF
MF
MF
AF
*1
AF
*2
AF
*3
AF
MF
MF
MF
AF
AF
MF
MF
MF
AF
*1
AF
*2
AF
*3
AF
MF
MF
SIGMA Sony Nikon Canon
824402 824624 824556 824273
1.4x Dedicated Lenses
REFERENCE
Indicates range of focal
length. The larger the
figures, the greater
the magnification of
distant objects. The
smaller the figures, the
wider the angle of view.
17-50
mm
Indicates maximum aperture. The
smaller the number, the “faster” the
lens, meaning more light can enter, to
allow shooting under dim illumination.
If only a single figure is given, the lens
is a prime (fixed focal length) lens or
a zoom lens that maintains the same
f-stop regardless of zoom position. If
the maximum aperture of a zoom lens
changes depending on zoom position,
it is expressed like this: F4.5-5.6
F2.8
Indicates lenses
equipped with
a Hyper Sonic
Motor, driven by
ultrasonic waves.
HSM
Indicates lenses
incorporating
an Optical
Stabilizer (OS) to
compensate for
camera shake.
OS
Indicates high performance
lenses designed especially for
DSLRs with APS-C size image
sensors. Vignetting will result if
used on larger sensors. Lenses
suitable for DSLRs having full-
size sensors are indicated by the
DG mark, and lenses dedicated
exclusively for mirrorless
interchangeable lens cameras
are indicated by the DN mark.
DC
Indicates Sigma’s
professional-grade
prime and zoom
lenses. Generally,
these lenses
retain the same
maximum aperture
regardless of zoom
position.
EX
Please refer to the examples below to interpret
Sigma product names listed in this catalog.
For further details on abbreviations, please see
Sigma Lens Technology on pages 22-23.
Product information
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