Description
Sigma 180/2.8 APO macro EX DG OS HSM
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.
SPECIFICATIONS
| Lens Construction | 19 Elements in 14 Groups | ||||||||
| Angle of View | 13.7 | ||||||||
| Number of Diaphragm Blades | 9 | ||||||||
| Mininum Aperture | f22 | ||||||||
| Minimum Focusing Distance | 47 cm / 18.5 in | ||||||||
| Filter Size (mm) | 86 | ||||||||
| Maximum Magnifications | 1:1 | ||||||||
| Dimensions (Diameter x Length) |
95 x 203.9 mm/3.7 x 8.0 in | ||||||||
| Weight | 1638g / 57.8oz. | ||||||||
| Corresponding Mounts |
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