The Sigma 105mm F2.8 EX DG OS HSM is a macro lens known for its versatility and sharp imaging capabilities. Designed specifically for Nikon F mounts, particularly in the DX crop sensor format, this lens is a solid choice for both macro enthusiasts and portrait photographers alike. Its build quality feels robust, and the inclusion of optical stabilization (OS) enhances its usability in low-light conditions, minimizing the effects of shake.
With a focal length of 105mm, this lens provides a nice balance between working distance and magnification, allowing you to capture intricate details of small subjects without getting too close. The f/2.8 maximum aperture is beneficial not just for macro photography but also for portrait work, enabling beautiful, creamy bokeh that helps isolate subjects effectively.
The lens features a HSM (Hyper Sonic Motor) for fast and quiet autofocus, which is particularly useful in delicate shooting scenarios, such as capturing insects or other wildlife without disturbing them. The focusing mechanism is generally reliable, though some users may find it a bit slower compared to some prime lenses in the same focal length range.
In terms of optical performance, the Sigma 105mm delivers excellent sharpness across the frame, even wide open. The color rendition is also impressive, often yielding vibrant images with minimal distortion. However, users should be aware that at very close distances, the lens can exhibit some chromatic aberration, though this is typically manageable in post-processing.
The Sigma 105mm F2.8 EX DG OS HSM is an outstanding macro lens that will satisfy both amateur and professional photographers who need a reliable tool for detailed close-ups or stunning portraits. While it has some minor drawbacks, such as slightly slow autofocus and chromatic aberration at close range, the overall optical quality, build, and stability make it a worthwhile investment for anyone seeking to expand their photographic capabilities with a high-quality macro lens. If you are in the Nikon F (DX) ecosystem, this lens is definitely one to consider.