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Sigma 18-50mm f2.8 EX DC Macro HSM -- A Bright Macro Lens

Sigma has been the ultimate option amongst the world-wide photographers because it satisfies every aspects of a quality camera or a lens. Sigma has the habit of creating massive waves in the market with the release of each of its products. One such product from Sigma which is making sensual waves among the photographers ever since January 2005 is this Sigma 18-50mm f2.8 EX DC Macro HSM.

The Sigma 18-50mm F2.8 EX DC MACRO HSM lens has been specially designed keeping, Nikon digital SLR cameras that feature an APS-C image sensor, in mind. The astonishing feature of this lens is the inclusion of HSM which means Hyper Sonic Motor; This HSM gives the lens, the ability of auto focusing without any noise. Like the non HSM version, this lens has a large f2.8 aperture that offers superior peripheral brightness and most particularly, it suits well for low-light photography. With its focal range that has a minimum focusing distance of 20 cm or 7.9 inches and a maximum magnification ratio of 1:3, this lens proves itself to be an ideal choice for portraits and snapshots.

This lens gets build up of Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) elements. Its inner focus system has been designed in such a way to make it suitable for petal-type lens hoods and other circular filters too. In addition, the Sigma 18-50mm lens can also be rated high in terms of portability. With the help of both the glass-mold and the hybrid aspherical lens technology, this lens is made compact and light weighted one.

The Construction of this lens is based on the 15 Elements in 13 Groups. It has an Angle of View 69.3 degrees and 27.9 degrees. The total number of Diaphragm Blades found in this lens is seven and this lens has a minimum Aperture of f22 and a Minimum Focusing Distance of about 28 cm or 11 inches. The Filter Size of this lens is 72 mm and it as a Maximum Magnification ratio of 1:3. The size of this lens in terms of its Diameter x Length is 79 mm x 85.8 mm or 3.1 inch x 3.4 inch. This lens weighs about 450 grams or 15.9 oz. The lens mounts which are suitable for this lens are available from various companies such as Sigma, Canon, Sony/Minolta, Pentax, and FourThirds.

The overall image quality of this Sigma 18-50mm f2.8 EX DC Macro HSM is excellent. It has been designed especially for the use with smaller chip APS-c or 4/3 digital cameras alone. The maximum sales retail price of this lens in about 660.00 US dollars.

dBal
Sun, 28 Mar 2010 13:22:17 +0000

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