Product Description
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With its wide zoom range, this lens has a focal range equivalent
to 25.5-105mm on a 35mm camera. 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, artistic
compositions, and many other uses. It's a compact lens ideal for
everyday use, offering uncompromising optical performance,
functionality, quality, and elegance.
Contemporary line can handle all sorts of photo rtunities
Sigma is organising all its interchangeable lenses into three
product lines; Contemporary, Art and Sports. Featuring the very
latest technology, and combining optical performance with
compactness, the Contemporary line covers a wide range of needs.
Incorporating the very latest technology in these lenses, Sigma
has solved the difficult problem of keeping size and weight low
without compromising optical performance. The SIGMA 17-70mm
F2.8-4 DC MACRO OS HSM is the first product from the Contemporary
line. Featuring a wide zoom range, the lens has a focal range
equivalent to 25.5-105mm on a 35mm camera.
Excellent for macro photography This lens' minimum focusing
distance is 22cm and the maximum magnification ratio is 1:2.8. At
70mm, the working distance becomes 5.52cm. When it comes to
telephoto, it can shoot pictures with a similar sensation to a
macro lens. Also, without the need to change the lens, it enables
photographers to take close up pictures of subjects such as
jewellery and flowers. In order to secure a clear field of view,
the design of this lens is very throughout, even down to the
precise position of the engraved letters on the lens.
30% smaller than conventional models For a lens which is used
used in everyday situations, the small size makes a big
difference. By incorporating a smaller OS unit and optimising the
structure and power distribution of optical elements, the lens
barrel has now become more compact. In order to ensure high
accuracy of the product, the new compound material TSC (Thermally
Stable Composite), which has high affinity to metal parts, is
introduced for the lens barrel. It results in better durability
of the parts and smaller zoom rings and scale rings. The
dimension of this lens is 30% smaller than our conventional
models.
Superior image quality throughout the entire zoom range This
lens incorporates 2 FLD (“F” Low Dispersion) glass elements,
which have performance equal to fluorite, 1 SLD (Special Low
Dispersion) glass element and 3 aspherical glass lenses including
a double sided aspherical lens. By optimizing the power alignment
of the lens, both chromatic aberration of magnification and axial
chromatic aberration have been corrected. From infinity to macro,
it achieves superior image quality through entire zoom range.
This lens offers extraordinary expressive power and is capable of
surpassing the requirement of the rigorous checking process of
our new MTF measuring system “A1”.
Large maximum aperture of F2.8 The aperture value is F2.8 at the
wide end (17mm), and is F4 at the telephoto end (70mm). The
bright viewfinder aids focusing and composition of images. The
fast apertures also offer useful functions such as fast shutter
speeds to prevent an object from being blurred and ensuring a
smooth bokeh in the background.
Optical Stabiliser Sigma's own unique OS (Optical Stabilizer)
function is incorporated. It offers effective correction of
approximately 4 stops, which makes it possible to compensate for
camera shake even in macro range photography where a small blur
can be easily identified.
Flare and ghosting conscious design In order to achieve high
rendering on this ship lens, flare and ghosting were
thoroughly measured from an early stage to establish an optical
design which is resistant to strong incident light such as
backlight. The Super Multi-Layer Coating reduces flare and
ghosting and provides sharp and high contrast images even in
backlit conditions.
Rounded diaphragm The 7 blade-rounded diaphragm creates an
attractive blur to the out-of-focus areas of the image.
Hyper Sonic Motor Sigma’s Hyper Sonic Motor (HSM) delivers high
AF speed and extremely quiet performance.
Ease of use The new product lines incorporate rubber for the
attachment part of the provided lens hood. For better usability,
the design of the lens cap and AF / MF changeover switch has been
improved.
Newly developed “USB DOCK” exclusively for new product lines
Based on these new lines, we have developed special software
(SIGMA Optimization Pro) that can update the lens firmware and
adjust parameters such as focus. Customize the focus setting of
my lens: In “SIGMA Optimization Pro”, please select the cell
covering the focus range you would like to customize. You can
change the setting by clicking in the spin box. Moving towards
the “Minus symbol” end, you can set the focusing position in
front, and towards the “Plus symbol” end slides it to the back.
After the customization, please take some test s and
re-adjust it with the software if necessary.
Box Contains
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Sigma 17-70mm f/2.8-4 DC OS Macro HSM
Lens Hood
Front and Rear Caps
Instruction Manual
1 Year Warranty Card
- 30% more compact than previous lenses of its type.
- Close fucusing distance of 22cm.
- FLD, SLD and Aspherical lens technology.
- Optical Stabilisation and high speed autofocus.
- Lens can be customised when used with Sigma's USB Dock.
- Image Stabilizer.