Sigma 180mm F5.6 APO Macro UC AF
Launched February 1990
SIGMA 180mm F5.6 APO Macro UC
The above lens is an U.C. (Ultra Compact) version of its `big brother the 180mm f2.8 lens. It’s unique combination of apochromatic design and macro capabilities produces a lens of excellent optical performance from infinity to minimum focusing distance of 55cm (1:2 reproduction ratio).
The lens has an internal focusing system with both 2nd and 3rd group lenses floating which makes for an extremely compact lens.
In common with all Sigma U.C. lenses this one also has a ZEN finish.
| Specifications | |
| Construction | 9 Elements in 6 Groups |
| Focal Length | 180mm |
| Maximum Aperture | ƒ5.6 |
| Minimum Aperture | ƒ22 |
| Field of View | 13.7° |
| Minimum Focus Distance | 55cm |
| Number of blades | 8 |
| Maximum Magnification | 1:2 |
| Zooming System | N/A |
| Filter Size | 52mm Rear |
| Diameter | 69mm (max.) |
| Length | 97.5mm |
| Weight | 435g |
| SRP at launch: | £249.95 |
| Available Mounts: | Minolta AF, Nikon AF, Pentax AF, Canon AF, most MF fittings. |