Sigma 18-125mm f/3.5-5.6 Lens for Nikon Digital SLR Cameras

Rating:
Summary: Terrific all-purpose digital lens, but be realistic
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.

Rating:
Summary: Sigma 18-125 lens for Nikon
Review: I bought this lens to use on my Nikon D70. I could not be more pleased with any lens. I compared shots taken with this lens to my Nikon 28-105 and cannot tell any differencs. This is a well made lens and I would reccomend it highly.

Rating:
Summary: Sigma 18 -125 f3.5-5.6 lens
Review: I bought this lens to use with my Canon EOS300D. Buyers should beware of the noticeable vignetting - in my opinion this problem is not acceptable in a lens of this price. Sigma should have sorted this out before putting it on the market. On the plus side is the convenient zoom range and the compact size. I guess it depends on whether you consider these benefits outweigh the vignetting problems. Yes, it can be corrected with imaging software, but who wants to have to correct every picture that has an area of sky or other light subject matter in the corners?