Sigma
10-20mm F4-5.6 EX DC HSM MSRP: $820 USD Super wide-angle
zoom lens designed exclusively for digital SLR cameras.
This ultra-wide zoom lens has a wide angle of view from
102.4 - 63.8 degrees (when Sigma mount is used) and it is
exclusive to digital SLR cameras. SLD glass elements
effectively compensate color aberration. Aspherical lenses
provide maximum correction for distortion and various
aberrations; high image quality is displayed throughout the
entire zoom range. The HSM equipped models makes fast AF
speeds and quiet shooting a reality, and it is also capable
of full-time manual focus. It has a minimum focusing
distance of 9.4" (24cm) at all focal lengths. It is also
equipped with an integral Petal-type hood to block out
extraneous light.
Ultra-wide zoom lens 10-20mm F4-5.6 EX DC HSM lens allows
enjoyment of super wide-angle photography and it is a very
powerful tool for indoor shooting and landscape photography
with APS-C size image sensors of digital SLR cameras. Wide
angle of view 102.4-63.8 degrees (for Sigma mount) offers
the photographer greater freedom of expression.
Most Appropriate Coating for Digital SLR Cameras The new
multi layer lens coating and lens design reduce flare and
ghost, which is a common problem with digital cameras and
also creates an optimum color balance through the entire
zoom range.
The best possible correction of aberrations Three SLD
(Special Low Dispersion) glass elements are employed for
effective compensation of color aberration, which is a
common problem with super-wide angle lenses. One piece of
glass mold and two hybrid aspherical lenses, offer excellent
correction for distortion, as well as all types of
aberration.
Inner focus system This lens incorporates an internal
focusing system, which eliminates front lens rotation
allowing the use of a Petal-type Hood and also minimize
fluctuation of aberration caused by focusing system.
HSM (Hyper Sonic Motor) The HSM equipped models ensure a
silent, high-speed AF function as well as full-time manual
focusing capability for Sigma, Canon, and Nikon-D mount
lenses.
Minimum focusing distance of 9.4" (24cm) at all focal
lengths This lens has a minimum focusing distance of 9.4"
(24cm) throughout the entire zoom range.
Sigma 10-20mm F4-5.6 EX DC HSM is awarded TIPA best consumer
lens in Europe 2006 Sigma 10-20mm F4-5.6 EX DC HSM super
wide-angle zoom lens, exclusively designed for digital SLR,
wins "TIPA (Technical Image Press Association) best consumer
lens in Europe, 2006" prize. Currently, 31 publications from
12 countries are members of TIPA (Technical Image Press
Association) organization and chief editors and technical
editors of these publications constitute this organization.
Since 1991, TIPA has presented many awards in several
sectors, including imaging. TIPA has stated that with a
versatile range of wide-angle focal lengths, a good optical
performance and a budget price, the Sigma 10-20mm is an
excellent investment for owners of DSLRs with APS-C format
sensors. Its sharpness remains constant throughout the zoom
range, and its compact size makes it an ideal companion for
shooting travel, landscapes or architectural photography.
This lens lets me go places that an 18-55 kit lens will not.
It takes photos of small kitchens, small bathrooms, and
small back yards. An extra 1 to 2mm over the 12-24mm Nikor
or the 11-16mm Tamron makes a difference in small areas. At
f/4 it is a little slow for interiors. it needs lots of
natural light or a strong bounce flash. If you try to use
the built-in flash, you're going to get a large shadow on
the bottom of your pictures. This is because the lens is so
wide the on-camera flash cannot see over the lens and casts
a shadow on the picture. To get around this limitation, I
use an inexpensive Nikon SB400 as a bounce flash with
success when ceilings are light colored and are 10 feet or
less. The Sigma 10-20mm sells for around $480 discount price
or about half as much as the Nikkor 12-24mm. It weighs 16.6.
For really wide angle work, there isn't a better choice.
As with all very-wide lenses, you have to be careful that you don't have people at the edges of
your frame or too close to the lens, or they will appear very distorted when
shooting photos at 10mm. Also note that a wide angle lens is not easy to use at first to create compelling images, as it's very easy to include too much clutter in your compositions. The
Nikkor 12-24mm doesn't go as wide, nor is it quite as sharp
at the widest end.
* Vignetting will occur if the lens is used with digital
cameras with image sensors larger than APS-C size or 35mm
SLR cameras.
Click a Photo Above for Larger Image
|
Lens Construction |
14 Elements in 10 Groups |
| Angle of View
|
102.4 - 63.8 degrees |
| Number of
Diaphragm Blades |
6 |
| Minimum
Aperture |
F22 |
| Minimum
Focusing Distance |
24cm/9.4 in. |
| Maximum
Magnification |
1:6.7 |
| Filter Size
|
Diameter 77mm |
| Dimensions
|
Diameter 83.5mm X Length 81mm
3.3 in. X 3.2 in. |
| Weight |
465g/16.4 oz |
| Corresponding
AF Mounts |
SIGMA, CANON, NIKON, SONY/MINOLTA,
PENTAX, FOUR THIRDS |
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