Product Description
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Near-Far effect helps to push and pull subjects to give a longer
field of view
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Sigma 10-20mm f/4-5.6 EX DC HSM Lens
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Produced in the legendary Aizu facility in Japan, Sigma presents
their 10-20mm f/4-5.6 EX DC HSM Lens. Building on 50 years of
innovation in precision optics design and craftsmanship, the
10-20mm is an ultra wide angle zoom lens which encompasses
several advance features designed to counter commonly found
optical aberrations. Deep and ultra sharp images are produced as
a result, making it a great value all round offering to any
budding photographer.
The Lens Design
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Design features make up the foundation of the Sigma 10-20mm lens.
Measuring just 8.1cm x 8.4cm and weighing an acceptable 470g, it
is both lightweight and compact for its focal class, making it
easy to handle but at the same time feel balanced when ed on
a DSLR. The lens features Sigma’s in-house developed inner focus
system, which both eliminates the need to extend the barrel,
reducing light loss, and the need to rotate the front lens. In
staying fixed, the front lens can accommodate a petal design hood
(included) that helps to counter light related issues such as
glare. The inner focussing system also allows for the use of
Circular Polarising filters.
Hyper Sonic Motor ensures fast, accurate and quiet auto focusing
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The lens features Sigma’s exclusive Hyper Sonic Motor (HSM)
which works to auto focus images in a fast, accurate and silent
manner. If preferred, a full time manual focus function is also
available. The lens is manufactured to Sigma’s high standards
with the body constructed from strong but lightweight
polycarbonate, layered in a hard-wear paint finish.
The Ultra Wide Angle Effect
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With a small variable focal length from 10 to 20mm, this
rectilinear lens is capable of capturing ultra wide angle images
(102.4° to 63.8°) which become “exaggerated” in perspective.
Thanks to higher aperture settings (f4-5.6), the depth of field
appears greatly increased giving the added benefit of keeping all
subjects in focus despite their varying distances. This effect
also creates a near-far relationship where backgrounds seem to be
pushed further away to make them appear smaller and closer
subjects pulled nearer to make them appear bigger, creating a
unique “stretched” effect. With a close focus distance of just
24cm, which stays consistent through all the focal lengths, you
can capture subjects in their entirety whether standing close up
or composing the image from a tight space. In anticipation of the
regular inclusion of bright light sources (e.g. the sun), Sigma
have also designed the lens to better cope with the undesirable
effects of flare and glare.
3 SLD and 3 Aspherical lens elements help to counter various
colour and optical aberrations
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The Optical Composition
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In all forms of lens construction, Sigma puts the highest
emphasis on the quality and craftsmanship of the internal optics.
As a result, the 10-20mm incorporates a set of cutting edge and
unique optical features which work to create bright and sharp
images. Three out of fourteen lens elements are manufactured from
Special Low Dispersion (SLD) glass, renowned for its high
resolution and light transmission properties. They work in
conjunction with one glass mould and two hybrid aspherical lens
elements to counter various colour and optical aberrations which
are commonly found in ultra wide angle lenses, such as chromatic
aberration. Furthermore, the configuration also ensures that all
levels of distortion are corrected. The resulting images speak
for themselves in terms of sharpness and resolution.
Super Multi Layer coatings work to eliminate flare and ghost
irregularities
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Finally, Sigma applies Super Multi Layer coatings to all lens
elements, which work to create an optimum colour balance by
reducing the damaging effects of ghost and flare. They also help
to maximise light transmission to the DSLR’s sensor.
A Lens Most Applicable For......
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With an achievable focal length between 10-20mm and multiple
spet optical features, this Sigma lens is a perfect match
for any photographer who would like to compose images with an
ultra wide angle perspective*. Accurately, quickly and
consistently these wide angle images can be produced both indoors
and out, all with the same stunning results. Landscape and
architectural photography are therefore perfectly suited to this
type of lens. Furthermore, thanks to a permanent close focus
distance and a high speed auto focus system, the lens would
perform well in various forms of close-up photography. Finally,
the compact and lightweight (for its class) design combined with
the silent focus function, make the lens both portable and
stealthy meaning it would work well when used out in the field
accommodating wildlife photography as well as other spet
outdoor pursuits.
* only suitable for cameras with an APS-C size sensor
Legal Discler
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Sigma 10-20mm F4-5.6 EX DC HSM (Canon) - 100% BRAND NEW WITH
FREE SHIP AND INSURANCE INCLUDED
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Box Contains
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* Sigma 10-20mm f4-5.6 EX DC HSM
* Fitted Padded Case
* Lens Hood
* Front and Rear Caps
* Instruction Manual
* 1 Year Warranty Card
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- Super wide-angle lens for Canon digital SLR cameras and an APS-C sensor.
- Incorparates SLD low dispersion elements and aspherical lenses.
- HSM motor for quiet, high speed focussing.
- Internal focussing.