- A high quality f2.8 constant aperture tele-zoom lens with optical stabilisation for Nikon SLR Cameras.
- Optical stabilisation enables use of shutter speeds four stops lower than otherwise would be possible.
- Ideal for portraiture and medium telephoto sports and animal photography:HSM motor for quiet high speed foccusing.
- Suitable for use with Nikon SLR cameras with both full and APS-C size sensors.
Product Description
-------------------
Sigma’s dedicated optical stabilisation system offers a 4 stop
blur correction with a 2 mode setting
Click here to view larger
( https://images-eu.ssl-images-.com/images/G/02/uk-electronics/product_content/sigma/Sigmas_dedicated_optical_stabilisation_system_offers_a_4_stop_blur_correction_with_a_2_mode_setting_large.jpg )
Sigma 70-200mm f/2.8 EX DG OS HSM
---------------------------------
Produced in their legendary Aizu facility in Japan, Sigma
presents their 70-200mm f/2.8 EX DG OS HSM telephoto zoom lens.
Building on 50 years of innovation in precision optics design and
craftsmanship, the 70-200mm is a large aperture zoom lens
optimised for mid-long distance photography. It packs several
state-of-the-art optical and design features which work to
counter issues commonly found in this type of lens. As a result,
deep and ultra sharp images are produced throughout the entire
zoom range, making it a great value offering to any photographer.
The Lens Design
---------------
Design features make up the foundation of the Sigma 70-200mm
lens. A commonly found problem in long distance photography is
camera shake and to help counter, Sigma has built in a dedicated
Optical Stabiliser system (OS) with a 2 mode function. The system
offers an effective blur correction over 4 stops, helping to
stabilise the image. It is also linked to the viewfinder,
allowing for more accurate previews. Each mode tweaks the OS
settings to suit different situations with mode 1 designed for
general photography and mode 2 for panning. A large maximum
aperture (f/2.8) ensures a fast shutter speed capability which
avoids any over exposure.
2 FLD and 3 SLD lens elements help to counter various colour and
optical aberrations, ensuring images are clear, sharp and high
resolution
Click here to view larger
( https://images-eu.ssl-images-.com/images/G/02/uk-electronics/product_content/sigma/2_FLD_and_3_SLD_lens_elements_help_to_counter_various_colour_and_optical_aberrations_ensuring_images_are_clear_sharp_and_high_resolution_large.jpg )
In a bid to keep the lens as compact and lightweight as
possible, several commonly found external functions have been
reengineered into the internal construction, making the 70-200mm
lighter and smaller than its competitors. The two key internal
functions are Sigma’s in-house developed inner focus system and a
new generation inner zoom mechanism. A common benefit of both
functions is that they eliminate the need to extend the barrel
and in doing so, reduce unnecessary light loss. Furthermore, the
front lens does not rotate and in staying fixed, can accommodate
a hood (used in conjunction with the supplied hood adapter) and
the use of Circular Polarising filters, both helping to counter
light related issues such as glare. If preferred, a full time
manual focus function is also available. The lens features
Sigma’s exclusive Hyper Sonic Motor (HSM) which works to auto
focus images in a fast, accurate and silent manner. Combined with
the optical stabiliser system, the lens has an extraordinarily
efficient focussing capability over long distances. The lens is
manufactured to Sigma’s high standards with a body constructed
from strong but lightweight polycarbonate, layered in a hard-wear
paint finish.
Special Low Dispersion (SLD) glass helps to counter chromatic
aberration
Click here to view larger
( https://images-eu.ssl-images-.com/images/G/02/uk-electronics/product_content/sigma/Special_Low_Dispersion_SLD_glass_helps_to_counter_chromatic_aberration_large.jpg )
Superior lenses: Where FLD meets SLD
------------------------------------
In all forms of lens construction, Sigma puts the highest
emphasis on the quality and craftsmanship of the internal optics.
The 70-200mm lens stays true to this promise with the use of F
Low Dispersion (FLD) glass. FLD glass is prized for having
performance equal to fluorite glass and is the highest quality
low dispersion glass in the world. The 70-200mm lens includes two
FLD lens elements which work in conjunction with three Special
Low Dispersion (SLD) elements to counter various colour and
optical aberrations which are commonly found in zoom lenses, such
as chromatic aberration. This optical configuration also ensures
that light transmission occurs at its best even at higher zoom
ranges where light loss can be a common problem. The resulting
images speak for themselves in terms of sharpness, contrast and
resolution.
9 Diaphragm blades produce a much more desirable Bokeh effect
Click here to view larger
( https://images-eu.ssl-images-.com/images/G/02/uk-electronics/product_content/sigma/9_Diaphragm_blades_produce_a_much_more_desirable_Bokeh_effect_large.jpg )
The Alternate Optical Composition
---------------------------------
As well as containing five top quality lens elements, several
other optical features can be found in the 70-200mm lens. First
and foremost is a 9 blade diaphragm which constructs a desirable
blur (bokeh) effect on out of focus areas. The diaphragm also
smoothes out intense back lighting, making them appear as rounded
highlights as sed to areas of over exposure. This effect
helps to over emphasise the foreground subjects and smooth out
the background, creating a well balanced image. 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. The coatings also help to maximise
light transmission to the DSLR’s sensor.
A Lens Most Applicable For......
--------------------------------
Packing so many design features and a first class optical
configuration, the Sigma 70-200mm lens has a wide range of
potential uses. High levels of light transmission combined with a
dedicated OS system make the lens ideally suited to mid-long
distance photography. This can include various forms of wildlife,
especially thanks to the quiet auto-focussing, as well as sports
related pursuits, e.g. motor racing. The lightweight and compact
structure of the lens, for its focal class, make it more portable
and easy to fit into a bag than normal and therefore ideal for
taking on holiday or days out. The solid focussing and OS systems
also make the lens perform well when using it for handheld
photography or alternatively a removable tripod collar can be
used to fix the lens (and DSLR) to a tripod for extra stability.
If you are after a lightweight, compact and good performing
mid-long range telephoto lens, then the Sigma 70-200mm is the
best choice for you.
A range of separately available Sigma APO teleconverters can be
used in conjunction with this lens. The converters substantially
increase the focal length of the lens to create even more
powerful zoom capabilities.
Box Contains
------------
Sigma