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Sigma announces two new lenses for digital SLRs

Sigma announces two new lenses ih the DG series, the 28-70mm F2.8 EX DG, a Compact, lightweight, yet robust, large aperture zoom lens, and the 24-70mm F2.8 EX DG Macro - Large aperture standard macro zoom lens. Sigma's DG lens series are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs.....

PRESS SUMMARY

A complete overview of Sigma's SLR lensesSigma 28-70mm F2.8 EX DG - Compact, lightweight, yet robust, large aperture zoom lens

This compact, large and constant F2.8 aperture zoom lens and is ideal for digital SLR cameras. Two SLD elements and four aspherical lenses provide the ultimate correction against distortion as well as all types of aberration, especially spherical aberration.

Lens Construction:  14 Elements in 12 Groups
Angle of View:  75.4 - 34.3 degrees  
Number of Diaphragm Blades:  9 Blades
Minimum Aperture:  F22
Minimum Focusing Distance:   33cm
Maximum Magnification:  1:4.4
Filter Size  Diameter:  67mm
Dimensions  Diameter:  74mm X Length 87.2mm
Weight:   510g

Corresponding AF Mounts SIGMA:  CANON, NIKON (D), MINOLTA, PENTAX
Nikon and Pentax mount lenses do not have an aperture ring.


Sigma 24-70mm F2.8 EX DG Macro - Large aperture standard zoom lens

Large aperture standard zoom lens provides superior performance both for Digital SLR Cameras and 35mm Film SLR Cameras.  To achieve an F2.8 aperture at all focal lengths, it employs three aspherical Lens to provide optimum aberration compensation. Two Special Low Dispersion (SLD) glass elements are provided for color aberration compensation, to assure high image quality

Lens Construction:  14 Elements in 13 Groups
Angle of View:  84.1 -34.3 degrees  
Number of Diaphragm Blades:  9 Blades
Minimum Aperture: F32
Minimum Focusing Distance:  40cm
Maximum Magnification:  1:3.8
Filter Size  Diameter:  82mm
Dimensions  Diameter:  88.7mm X Length 115.5mm
Weight:   715g
 
Corresponding AF Mounts:  SIGMA, CANON, NIKON (D), MINOLTA(D), PENTAX

Additional information: A complete overview of Sigma's SLR lenses
January 23, 2005
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