Sigma 18-125mm f/3.5-5.6 DC IF Aspherical Zoom Lens for Nikon Digital SLR Cameras

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Price: $229.99    

Product Feature

• Nikon "G" mount; telephoto zoom lens
• Aspherical lens elements; The IF (Internal Focus) design allows for a non-rotating front barrel
• 18-125mm focal length
• f/3.5-5.6 maximum aperture
• Exclusively designed for use with digital SLR cameras

Product Description

This zoom lens was exclusively designed for use with Nikon digital Single-Lens Reflex (SLR) cameras and has a 6.9:1 zoom ratio. The image circle is designed to match the size of the image sensor of digital SLR cameras. From wide angle to telephoto, this new zoom lens can capture a wide range of subjects. As there is no need to change lenses, there is no risk of missing those great shots. This lens has a minimum focusing distance of 50cm (19.6") at all focal lengths and a maximum magnification of 1:5.3. A distance scale on the focus ring makes the lens convenient and easy to use. A Special Low Dispersion (SLD) lens and two aspherical glass elements produce a high level of optical performance through the entire zoom range, and Super Multi Coating reduces flare and ghosting that tends to occur when using digital SLR cameras. Angle of View - 69.3 - 11.4 degrees Number of Diaphragm Blades - 7 Blades Minimum Aperture - F22 Minimum Focusing Distance - 50cm Maximum Magnification - 1 - 5.3 Filter Size - 62mm (2.44) Diameter Dimensions - D - 2.75 x L - 3.05 Weight - 13.58 ounces

Sigma 18-125mm f/3.5-5.6 DC IF Aspherical Zoom Lens for Nikon Digital SLR Cameras Review

I bought this lens so that when I travel using my Nikon D100 I could have an all-in-one zoom that would spare me the inconvenience of constantly changing lenses. I have not regretted this purchase, as for most situations the resulting photos are quite satisfactory. However, potential buyers should be aware that any lens that is designed to "do it all" involves compromises.

The lens balances well on an SLR body, is remarkably compact, and is well-made. It's not as solid, however, as an expensive professional-level zoom, so don't drop it! The petal-type lens hood works well to prevent routine flare.

Photos I have taken have been sharp and clear, with only a bit of softness at maximum aperture and at the longest focal lengths. The lens has a few shortcomings, however. In some lighting situations the color cast of digital images seems to be a bit "tan," tending almost toward sepia tones. This can be corrected easily enough in Photoshop (or whatever post-exposure program one uses). Perhaps a bit more annoying is that there is noticeable light falloff in the corners, a phenomenon that is most prominent in photos that include large areas of sky. Again, this can be dealt with in post-processing (mainly through slight cropping), but potential buyers should be aware of this issue.

The best thing about the lens is that it provides adequate performance at focal lengths ranging from standard wide-angle (what would be the equivalent of around 27mm. in a 35mm. camera) to basic telephoto (187 mm. at 35mm.) This makes it quite useful for general, "walkaround" photography, especially when one is traveling. If you want the absolute best in optical performance, however, you might find the lens wanting in some situations.

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