Sigma has considerably put efforts to fashion a new EX DG MACRO Lens for Digital SLR as well as 35mm Film SLR cameras. The lens integrates three aspherical lenses to achieve an F2.8 aperture at all focal lengths. Besides offering optimal aberration compensation, the DG Macro lens also features two Special Low Dispersion glass constituents to minimize color deviation and produce superior image quality. The coated Super Multi-layer remarkably cuts down flare and ghosting. The minimum focusing distance of 40cm at all focal lengths engages you in macro photography with a maximum magnification ratio of 1:3.8. Besides bearing a focusing ring for manual mode, it also incorporates a Dual Focus system for simplifying autofocussing. The EX DG MACRO Lens will be retail for $670.00.

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