The APO Macro Sigma 180mm F2.8 EX DG OS HSM is a high performance telephoto macro lens designed for Full Frame sensors but may also be used with smaller APS-C size sensors with a corresponding effective increase in focal length to about 260mm with most cameras. The 180mm F2.8 has a large aperture to handle any lighting scenario and the macro capabilities allow focusing down to 1:1 magnification ratio at its closest working distance of 18.5 inches. A Hyper Sonic Motor (HSM) ensures quiet, high speed, and accurate autofocusing while an Optical Stabilizer (OS) compensates for camera shake when shooting hand held. The 180mm F2.8 macro also incorporates a floating Internal Focusing system which reduces aberration during shooting working together with three FLD ("F" Low Dispersion) glass elements for superior correction of color aberration. This lens has a rounded 9 blade diaphragm creating an attractive blur to the out of focus areas of the image and is also compatible with Sigma APO teleconverters.

OS - Optical Stabilizer Function
HSM - Hyper-Sonic Motor
EX - EX Lens
DG - DG for Digital

*Nikon mounts do not have an aperture ring. Some functions may not work depending on the camera model. This lens cannot be used with film SLR cameras with the exception of the Nikon F6 and Canon EOS-1v.

*When using the OS function of a lens with a camera which incorporates a stabilizer unit, please turn the camera's stabilizer unit off.
*When using the APS-C Hood Adapter HA927-01 with digital cameras with larger than APS-C size image sensor, vignetting will occur. Please remove he hood adapter id you are using these cameras.

* The appearance, specifications, and the like of the product are subject to change for improvement without notice.