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Optical design
| Format: APS-C (crop)
Type: Zoom lens
Focusing: Auto Focus (AF)
Lens mounts: Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), 4/3 (Four/Thirds), 4/3 (Four/Thirds), 4/3 (Four/Thirds), 4/3 (Four/Thirds), Pentax K, Pentax K, Pentax K, Pentax K, Sigma SA, Sigma SA, Sigma SA, Sigma SA
Optical design: 15 elements in 13 groups.
| User reviews (0) Photos (0) Tests (0) Owners (2) Views (7813) Average price: $633 |
Specifications:
| Focal length | Max. aperture | Min. aperture | Blades | Min. Focus (m.) | Filter Ø (mm.) | Weight (gr/oz) | Length (mm/in) |
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| 18mm - 50mm | f/2.8 | f/22 | 7 | 0.28 | 72 | 445/15,7 | 84.1/3,3 |
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Additional information:
The Sigma AF 18-50 mm f/ 2.8 EX DC Macro is a standard zoom lens for 35 mm SLR cameras of popular autofocus systems.
EX series is a professional line of Sigma lenses, remarkable for its high mechanical and optic quality.
DC series is a line of Sigma lenses optimized for digital SLR APS-C cameras.
The focusing is internal, the front element does not rotate during focus operations.
The Sigma AF 18-50 mm f/ 2.8 EX DC Macro replaced the Sigma AF 18-50 mm f/ 2.8 EX DC. Later on (presumably in 2008) Sigma went on producing this lens with a hyper sonic motor.
Posted by: temas Date of publication: 04.06.2011
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