 Sigma macro 105mm lens - Features
The minimum focusing distance of 31.2cm is capable of macro photography with a maximum magnification of 1:1. It is possible to shoot life-size close-up to infinity. Sigma, Canon and Konica Minolta mounts have a minimum aper- ture of f45 for incredible depth of field (or f32 for Nikon and Pentax mounts). This lens is equipped with a "Focus Limiter Switch" that limits the AF range so improving the speed and accuracy of auto focus. It also incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during AF.
Sigma macro 105mm f2.8 EX DG lens - Easy handling
The large focus ring offers smooth and positive action whilst focusing manually. A screw-in hood is included, for convenient use of circular polarizing filters. This telephoto macro lens has an equivalent field of view of 178mm on a digital SLR camera (when used with the SD10). It has a filter size of 58mm and, at just 450g, is also extremely lightweight.
Sigma macro 105mm f2.8 EX DG lens specifications
- Focal Length: 105mm
- Minimum Aperture: F32
- Lens Construction: 11 Elements in 10 Groups
- Angle of View: 23.3°
- Number of Diaphragm Blades: 8pcs
- Minimum Focusing Distance: 31.2cm
- Maximum Magnification: 1:1
- Filter Size: 58mm
- Lens Hood: Screw-in Type
- Dimensions: Max. Diameter 74mm x Length 95mm
- Mounts (AF): Sigma, Canon, Nikon, Pentax, Minolta
- Weight: 450gr.
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Sigma macro 105mm f2.8 EX DG lens launch : The Sigma macro 105mm f2.8 EX DG lens employs a new design concept for digital SLR cameras, its new lens power layout produces an excellent optical performance. The new lens coating and new lens design cuts down flare and ghost. The lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor. Its outstanding optical performance provides the ultimate correction against transverse chromatic aberration and distortion. The lens demonstrates an excellent performance with both digital and 35mm film SLR cameras and boasts compact dimensions of 74mm (max. diameter) and 95mm (overall length). 
