A medium-telephoto Macro lens from Sigma This medium-telephoto length Macro lens from Sigma is usable on both full-frame and APS-C image sensors, offering a magnified 105mm (approximately) on the latter. 1:1 magnification ratio is on offer, allowing for “life-size” images on your sensor, meaning you can capture the smallest of subjects with the utmost detail. Closest focus of this lens is just 7.4 inches, which allows you to get right in close to flowers, bugs, insects and capture them sharply and clearly. A flat front lens awards you with edge-to-edge sharpness, perfect for reproductions of artworks, documents, stamps etc. The medium-telephoto length of this Sigma Macro lens allows you to photograph subjects without getting too close to them. This will mean they will not get distracted or spooked - excellent for photographing small creatures and even focusing the lens for portraiture. The large f2.8 aperture rating makes it possible to use the lens without a tripod, due to the faster shutter speeds that you can shoot with. Even when you are working in close where focus is critical to the finished product, this large aperture offers you enough stability for pleasing results. A wonder of modern design, this Sigma lens can achieve the excellent results in a package that is merely 3.7 inches in length. Floating internal focus make this compact size possible throughout usage, also aiding in closest focus performance. Optically, the lens includes Three SLD glass elements for the overall excellence of images and the reduction of aberrations, while Super Multi-Layer coating tackles Flare and Ghosting comprehensively.