Brochure
36
17-70mm
Indicates range of focal length. The
larger the number, the greater the mag-
nication of distant objects. The smaller
the number, the wider the angle of view.
F2.8-4
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 gure is given, the lens
is a prime (fixed focal length) lens or
a zoom lens that maintains the same
F-number regardless of zoom position.
If the maximum aperture of a zoom lens
changes depending on zoom position, it
is expressed thus: F2.8-4.
EX
Indicates SIGMA’s professional-grade
prime and zoom lenses. Generally, these
lenses retain the same maximum aper-
ture regardless of zoom position.
DC/DG/DN
Indicates high-performance lenses
designed especially for cameras with
APS-C size image sensors. Vignetting
will result if used on larger sensors.
Lenses suitable for cameras having full-
frame sensors are indicated by the DG
mark, and lenses exclusively for mirror-
less interchangeable lens cameras are
indicated by the DN mark.
OS
Indicates lenses incorporating an Op-
tical Stabilizer (OS) to compensate for
camera shake.
HSM
Indicates lenses equipped with a hyper-
sonic motor.
Please refer to the examples below to interpret the SIGMA product names listed in
this catalog. For further details on abbreviations, please refer to the major distin-
guishing characteristics on page 8.
Abbreviations used in the product names in this catalog
REFERENCE
17-70mm F2.8-4 DC MACRO OS HSM /
DC MACRO HSM
Hood (LH780-03) supplied
High-performance and compact—large-aperture APS-C format standard zoom lens
Covering the standard zoom range, the lens has a focal range equivalent to 25.5-105mm on a
35mm lens. Thanks to Sigma's latest technologies, it's exceptionally lightweight and 30% more
compact by volume than previous lenses of its type. Its low F-number equips photographers to
shoot subjects at extremely close range, making this the perfect lens for travel, family photos, ar-
tistic compositions, and many other uses. A complement to uncompromising optical performance.