Sigma Press Release 18/06/04

A new design concept for digital cameras. (2004.6.18)

MACRO 105mm F2.8 EX DG

Compact and lightweight medium telephoto macro lens.

Optimized image quality for Digital SLR cameras.
- Super Multi Layer (SML) coating reduces the ghost caused by reflections from the surface of digital image sensors.
- Features a compact lens design with an overall length of just 95mm.
- Minimum aperture of F/45 provides greater depth of field (F/45 for Sigma, Canon and Konica Minolta mounts and F/32 for Nikon and Pentax mounts).
- A screw-in lens hood for convenient use of circular polarizing filters

Sigma Corporation is pleased to announce the launch of the new MACRO 105mm F2.8 EX DG lens.
This new medium telephoto macro lens employs a new design concept for digital SLR cameras, its new lens power layout produces an excellent optical performance. The new lens coating cuts down ghost. The new DG 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 lateral chromatic aberration and distortion.
This lens boasts compact dimensions of ?74mm (maximum diameter) and 95mm (overall length). It has a filter size of ?58mm and, at just 450gms, is also extremely lightweight. The minimum focusing distance of 31.2cm (12.2?) is capable of macro photography with a maximum magnification of 1:1. It is possible to enjoy photography from life-size close-up to infinity. Sigma, Canon and Konica Minolta mounts have a minimum aperture of F/45 for incredible depth of field (or F/32 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 autofocus. It also incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during auto focusing. 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).

THE SPECIFICATIONS
*Focal Length :105mm *Minimum Aperture :F/45 (for Sigma, Canon and Konica Minolta mounts) F/32 for Nikon and Pentax mounts *Lens Construction :11 Elements in 10 Groups *Angle of View :23.3degree *Number of Diaphragm Blades :8pcs *Minimum Focusing Distance :31.2cm (12.2in.) *Maximum Magnification :1:1 *Filter Size :58mm *Lens Hood :Screw-in Type *Dimensions :Max. Diameter 74mm (2.9in.) X Length 95mm (3.7in.) *Mounts (AF) :Sigma, Canon, Nikon, Pentax, Minolta *Weight :450gr/ 15.8oz

Optional Accessories
SIGMA EX Multi-Coated UV 58 mm Filter
SIGMA EX Wide Multi-Coated Circular PL 58 mm Filter