Sigma 10-20mm F4-5.6 EX DC HSM Lens Review

The Sigma 10-20mm F4-5.6 EX DC HSM is, on paper at least, a very attractive option for APS-C users looking for an ultra-wideangle zoom. The standout selling points are undoubtedly that 10mm wideangle view and the HSM focusing motor, which when coupled with Sigma's traditionally keen pricing, makes for a compelling overall package. In the flesh that promise is to a great extent realized; optically the lens is a solid if not outstanding performer, build quality is up to Sigma's usual standards, and the focusing is indeed fast, silent and accurate. So far, so good.

Sigma 10-20mm F4-5.6 EX DC HSM Lens
Designed exclusively for Nikon digital SLR cameras capable of wide-angle photography, the Sigma 10-20mm f/4-5.6 lens is a powerful tool for landscape photography and other wide-angle applications. The lens offers an ultra-wide angle of view of 94.5 to 56.8 degrees, with three special low dispersion (SLD) glass elements and three aspherical lenses providing optimum image quality throughout the entire zoom range. The lens also incorporates a Hyper Sonic Motor (HSM) to ensure quiet, high-speed autofocusing in addition to full-time manual focusing. Other features include a close focusing distance of 9.4 inches, a non-rotating lens barrel that perfectly suits the petal-shaped lens hood (included), and a one-year warranty.

Sigma 10-20mm F4-5.6 EX DC HSM Lens Specifications

Focal length: 10-20mm
Maximum aperture: f/4-5.6
Lens construction: 14 elements in 10 groups
Angle of view: 94.5 to 56.8 degrees
Number of diaphragm blades: 6
Minimum aperture: f/22
Minimum focusing distance: 9.4 inches
Maximum magnification: 1:6.7
Mount: Nikon
Filter size: 77mm
Filter size: Petal-type hood
Dimensions: 3.3 inches in diameter and 3.4 inches long
Weight: 17.5 ounces
Warranty: 1 year

Sigma 10-20mm F4-5.6 EX DC HSM Lens Description

Sigma provides the new ultra-wide angle zoom lens from 15mm and this lens is the first of its kind in the world. It can be useful for images of landscapes, large buildings, group photographs or even more. The perspective that changes with the angle-of-view gives picture an extraordinary feeling. Delicate compositions can be adjusted by lens zooming and this is helpful for close-up photography. Provides deep depth of field with its short focal length for amazing photographic expressions. This ultra-wide zoom lens covers a large wide-angle range from 15 mm to 30 mm. With a minimum focusing distance of 30 cm(11.8 inches) throughout the entire zoom range, it is an ideal lens for Digital SLR Cameras. It incorporates hybrid aspherical lens in the front lens group to minimize distortion and astigmatism, and molded glass aspherical lens in the rear lens group to minimize spherical aberration. Minimization of the distortion is a most important issue for zoom lens, but Sigma has succeeded, to provide image quality with minimal distortion by employing aspherical lenses. This lens in corporates an internal focusing system, which eliminates front lens rotation. Since focusing do not change its overall length, this lens is easy to hold and use. Also it is allowing the use of a Petal-type Hood. The lens also incorporates Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens.

Excellent value. Fantastic lens too - delivered quickly and in perfect condition. Will definitely buy from this site again - keep up the great work and excellent prices!!

Sigma 10-20mm F4-5.6 EX DC HSM Lens Package Contents:

  • Front & Rear Lens Cap

  • Lens Hood

  • Case

  • Sigma #201 10-20mm F4-5.6 EX DC HSM Ultra Wide Lens
A DC series lens designed exclusively for use with smaller chip APS-c or 4/3 cameras

Lens Construction: 13 Elements in 10 Groups

  • Angle of View: 102.4 - 63.8 degrees

  • Number of Diaphragm Blades: 7 Blades

  • Minimum Aperture: F22

  • Minimum Focusing Distance: 24cm / 9.4 in.

  • Maximum Magnification: 1:6.6

  • Filter Size: Diameter 77mm

  • Lens Hood: Petal-type Hood

  • Dimensions: Diameter 87.3mm X Length 88.2mm/3.4 in. X 3.5 in.

  • Weight: 520g / 18.3 oz.
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