October 2013
A | Art
SIGMA 24-105mm F4 DG OS HSM
Digital SLR cameras have been evolving rapidly, and more and more photographers have been seeking a lens that can
bring out the potential of a high-resolution sensor. There are occasions when photographers select zoom lenses as they
offer more convenience than a fixed focal length lens, yet they do not want to compromise on image quality. SIGMA
has long tackled this task to provide excellent quality images for such occasions. We are proud that SIGMA 24-
105mm F4 DG OS HSM meets these requirements and is the standard zoom lens from our "Art" line, offering stable
and fine image quality from wide to mid-telephoto range. It has a combination of fixed aperture and a good zoom ratio
that we kept as high as possible. Many simulations were carried out before achieving this goal, and made the
specification compatible with 35mm full size image sensors. Moreover, it was designed to surpass the quality
inspection of the original MTF measuring system, A1, so it has succeeded in creating superior image quality for the
new standard of high-spec cameras.
● Angle of view differs on cameras to which the lens is attached.
Corresponding AF Mounts: Sigma, Nikon, Canon, Sony*
*Sony mount does not include Optical Stabilization
Accessories: Case and Petal Hood (LH876-02) supplied.
* The Appearance and specifications are subject to change without notice.
Convenient handling
The lens' wide zoom ring ensures convenient handling. Putting the zoom ring in front allows the lens barrel to be more
compact. The inner focusing system eliminates front lens rotation, enhancing the lens' stability and allowing use of
Circular Polarizing filters.
Designed to minimize flare and ghosting
Flare and ghosting were thoroughly measured and monitored from an early stage in the lenses development to
establish an optical design which is resistant to strong incidental light such as backlight. The Super Multi-Layer
Coating reduces flare and ghosting and provides sharp and high contrast images even in backlit conditions.
Minimum focusing distance of 45cm
With a minimum focusing distance of 45cm and a maximum magnification ratio of 1:4.6, this lens is excellent for
close-up photography.
Hyper Sonic Motor
The HSM (Hyper Sonic Motor) ensures a silent, high-speed AF function. Optimizing AF algorithm, smoother AF is
achieved. It also enables full-time manual focusing capability which allows sensible focus adjustment by simply
rotating the focus ring.
Incorporating Rounded diaphragm
The 9 blade rounded diaphragm creates an attractive round bokeh at large-aperture settings.
Design concept
The new product lines incorporate rubber for the attachment part of the provided lens hood. For better usability, the
designs of the lens cap and AF/MF changeover switch have been improved. In order to ensure high accuracy of the
product, all metallic parts and the new compound material, TSC (Thermally Stable Composite), which has a high
affinity to metal parts, are housed internally. On the zoom ring, the last three digits of its release year are engraved so
the lens can be identified according to the year of its launch.
Brass made bayonet mount
This lens incorporates a brass made bayonet mount which has both high accuracy and durability. A special treatment
to reinforce its strength is applied to the surface giving it greater strength and making it highly resistant to long-term
use.
Newly developed “USB DOCK” exclusively for new product lines
Attaching the lens to an optional USB DOCK plugged to your computer and using dedicated software “SIGMA
Optimization Pro”, you can update the lens firmware and adjust parameters such as focus.
Evaluation with Sigma’s own MTF measuring system “A1”
We used to measure lens performance with MTF measuring system using conventional sensors. However, we've now
developed our own proprietary MTF (modulation transfer function) measuring system, called A1, using 46-
megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the
scope of our quality control inspections. The SIGMA 24-105mm F4 DG OS HSM will all be checked using this “A1”
before they are shipped.
“Made in Japan”
All Sigma’s manufacturing processes- right down to molds and parts, with a few exceptions, are carried out under a
single integrated production system entirely in Japan. We like to think our products are somehow imbued with the
essence of our homeland, blessed as it is with clean air and water, and focused, hard-working people. We pride
ourselves on the authentic quality of Sigma products, born of a marriage between highly attuned expertise and
intelligent, advanced technology. Our sophisticated products have satisfied professionals and lovers of photography
all over the world, because our manufacturing is based on genuine craftsmanship, underpinned by the passion and
pride of our experts.
Applicable for the Mount Conversion Service
As an experienced lens manufacturer that has been creating a diverse range of interchangeable lenses, we are proud to
introduce a new paid service “Mount Conversion Service” (starting from September 2nd, 2013)*. With this service,
the mount of your current SIGMA lenses can be changed to another mount of your choice. It gives a new life to your
favorite lenses when you wish to use it on a different camera body.
* This “Mount Conversion Service” is different from a normal repair. In order to apply for the service, please contact your nearest authorized subsidiary /
distributor of SIGMA.
[Specification] For Sigma mount
Lens Construction: 19 elements in 14 groups | Minimum aperture: F22 | Filter size: ø82mm | Angle of view (35mm
format) : 84.1°-23.3° | Minimum focusing distance: 45cm/17.7in. | Dimensions (Diameter x Length): ø88.6mm x
109.4mm/3.5in. x 4.3in. | Number of diaphragm blades: 9 (Rounded diaphragm) | Maximum magnification ratio:
1:4.6 | Weight: 885g/31.2oz
[UPC Code]
SIGMA : 0085126-635565
SONY : 0085126-635626
Nikon : 0085126-635558
Canon
: 0085126-635541
[Accessories]
Lens Hood LH876-02 (supplied)
FRONT CAP LCF-82 III (supplied)
REAR CAP LCR II (supplied)
SIGMA : 0085126-929497
SIGMA DG UV 82mm
: 0085126-930189
: 0085126-930028
Nikon : 0085126-929503
: 0085126-923761
Canon
Canon
: 0085126-929510
: 0085126-878542
SIGMA DG WIDE CIRCULAR PL 82mm : 0085126-923877
SIGMA USB DOCK
SIGMA : 0085126-878566
Nikon : 0085126-878559
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