I have a Sigma 18-50mm f2.8 EX DC Macro HSM which i just bought last week and to tell anyone honestly I liked it a lot. I mainly used this camera lens as a standard zoom for my Nikon D40 because it covers all focal lengths I usually use for indoor shooting. Also it provides faster aperture available for DSLR zooms, which is an absolute must for shallower depth-of-field portraits and low-light photography.

So before I go into any deeper I need to explain first what is the full feature and advantages of my new Sigma Camera lens.

Sigma 18-50mm f2.8 EX DC Macro HSM has a large aperture zoom lens designed especially for use with digital SLR cameras with minimum focusing distance of 20cm (7.9”). The lens is especially designed to suit the characteristics of digital SLR cameras and provides a high level of optical performance. It has a large aperture of F2.8 throughout the entire zoom range, offers superior peripheral brightness as well as a compact and lightweight construction. Also having a maximum magnification of 1:3 making it ideal for close-up photography.

What are the features this camera lens provides?

Excellent optical Design

The Sigma Camera Lens produces an exceptional level of optical performance with a Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD) glass elements which provides excellent correction of colour aberrations.

Compact and Lightweight lens

The design incorporates both glass-mold and hybrid aspherical lens technology which makes a compact and lightweight construction.

Reduced Ghosting and Flare

The super multi-layer lens coating reduces flare and ghost. High image quality is assured throughout the entire zoom range.

Inner Focus System

An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the petal-type lens hood (supplied) plus circular polarizing filters.

Having my own satisfactory opinion for this camera lens, having my sigma camera lens compared with other camera lenses, I prefer this one as it provides quality as well as affordability.

Product Description
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Sigma 50-500mm f/4.5-6.3 APO DG OS HSM SLD Ultra Telephoto Zoom Lens for Nikon Digital DSLR Camera

• Dedicated to Nikon AF SLR cameras
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• Uses the silent HSM (Hyper Sonic Motor)
• Apochromatic design, 2 SLD (Special Low Dispersion) glass elements, floating inner focus system
• Chromatic, spherical aberrations, and astigmatism virtually eliminated

Product Description
Sigma Fixed Focal Length Lens With innovative, state-of-the art technology, Sigma s complete line of lenses expand your ranges of photographic possibilities. Sigma lenses are designed to be sharp, versatile, ergonomic and unmatched for low weight and compactness. Sigma s fixed focal length lenses range from full macro capabilities to wide and ultra-wide lenses. Some are equipped with a HyperSonic Motor (HSM) for added power and convenience, while still others are ul… More >>

Sigma 180mm f/3.5 EX IF HSM Macro Lens for Nikon SLR Cameras

• Dedicated to Nikon AF SLR cameras
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• High magnification of 1:2 (one-half life-size) for macro photography
• Lens constructed of an ecological, lead- and arsenic-free glass
• Minimum focus range of 59.1 inches, 37.4 inches in Macro

Product Description
This is a telephoto zoom lens with excellent cost performance, for it is capable of macro photography with a 1: 2 maximum close-up magnification at the 300 mm focal length. It also has a switch for changeover to macro photography at focal lengths between 200 mm and 300 mm. The minimum focusing distance is 1.5 m/59 inches at all zoom settings. Sigma used SLD (Special Low Dispersion) glass in this lens for excellent correction of chromatic aberration. And, Sigma effec… More >>

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• Dedicated to Nikon AF SLR cameras
• Ultra-telephoto, telephoto, and macro photography all in one lens
• High magnification of 1:2 (one-half life-size) for macro photography
• Lens constructed of an ecological, lead- and arsenic-free glass
• Two special low-dispersion glass elements in the front lens group, in addition to a special low-dispersion glass element in the rear lens group

Product Description
Sigma’s 70-300mm F4-5.6 DL MACRO SUPER is one of several new tele zoom lenses. It is a compact Tele-Macro Zoom lens, capable of focusing down to 1: 2 (half life-size) reproduction ratio at 300mm focal length (an optional accessory 58mm achromatic close-up lens allows even closer focusing and reproduction ratios up to 1: 1 or life-size), with superb optical quality. A detachable bayonet hood is provided. The lens materials used in this new product are lead and arseni… More >>

Sigma 70-300mm F4-5.6 APO Macro Super Lens for Nikon-AF Camera

• Dedicated to Nikon AF SLR cameras
• Ultra-telephoto, telephoto, and macro photography all in one lens
• High magnification of 1:2 (one-half life-size) for macro photography
• Lens constructed of an ecological, lead- and arsenic-free glass
• Minimum focus range of 59.1 inches, 37.4 inches in Macro

Amazon.com Product Description
Sigma’s 70-300mm f4-5.6 DL Macro Super lens can achieve a magnification ratio of 1:2 (one-half life-size) for macro and telephotography images at its 300mm focal length. As an accessory, you can add a 58mm achromatic close-up lens (not included), and get even closer focusing and reproduction ratios of 1:1 (life size) and still maintain excellent optical quality. The optical materials are made from lead-free and arsenic-free ecological glass. This model is… More >>

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• High Image Quality – SLD glass elements with inner focusing
• High Magnification – 1 – 4.5 magnification, exclusively designed for digital SLRs

Product Description
This compact high-performance telephoto zoom lens incorporates Sigma’s own Optical Stabilizer function. The lens incorporates SLD (Special Low Dispersion) glass in the front lens groups and is equipped with an inner focusing system to provide high image quality throughout the entire zoom range. The incorporation of HSM (Hyper-Sonic Motor) ensures quiet and high-speed auto focus. The OS (Optical Stabilizer) function effectively eliminates the effects of camera shak… More >>

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• Filter Size: 82mm

Product Description
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• Number of Diaphragm Blades – 7
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• Minimum Focusing Distance – 30cm/11.8 in.

Product Description
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Sigma 18-50mm f/2.8-4.5 SLD Aspherical DC Optical Stabilized for Nikon Digital SLR Cameras