DESCRIPTION

Sigma Corporation is pleased to introduce a new member of our EX series of lenses, the 180mm f3.5 EX APO Macro. This new high performance telemacro lens can focus from infinity to full 1:1 Life-size reproduction without accessories. At 1:1 reproduction the distance from subject to film plane is 18.1 inches, making this lens convenient for photographing subjects which are not easily approached, such as small animals or insects, etc. The apochromatic design and two SLD (Special Low Dispersion) glass elements, plus floating inner focus system effectively control Chromatic and Spherical Aberrations as well as Astigmatism, providing superb performance throughout the focusing range. The models for Sigma, Canon and Nikon AF cameras employ Sigmas HSM (Hyper Sonic Motor) for quiet, responsive AF function plus "full time" manual focus.