HSM has now been added to the Nikon mount 17-70mm F2.8-4.5 DC MACRO HSM and 18-50mm F2.8 EX DC MACRO HSM, allowing autofocus with all Nikon DSLR cameras (inculding the D40 and D40x). Sigma Corporation is pleased to announce the launch of the new 17-70mm F2.8-4.5 DC MACRO HSM for Nikon and 18-50mm F2.8 EX DC MACRO HSM for Nikon. Large aperture standard zoom lens designed specially for digital SLR cameras. 17-70mm F2.8-4.5 DC MACRO HSM for Nikon The HSM system has been incorporated into this large aperture standard zoom lens for digital SLR cameras. This lens is capable of autofocusing with all Nikon DSLR cameras (including the D40 and D40x) and has a minimum focusing distance of 20cm (7.9") and maximum magnification of 1:2.3 enabling close-up photography. A Special Low Dispersion (SLD) lens and Aspherical lens allows a compact construction and high optical performance.
SPECIFICATIONSLens Construction
15 Elements in 12 Groups
Angle of View 79.7 - 22.9 degrees (Sigma SD format) Number of Diaphragm Blades 7 BladesMinimum ApertureF22Minimum Focusing Distance 20cm/7.9 in.Maximum Magnification 1:2.3Filter Size Diameter 72mmDimensions Diameter 79mm perchè Length 82.5mm
3.1 in. perchè 3.2 in.Weight490g/17.3 ozCorresponding AF Mounts SIGMA
Large aperture zoom lens designed specially for use with digital SLR cameras with a minimum focusing distance of 20cm (7.9"). 18-50mm F2.8 EX DC MACRO HSM for Nikon
The HSM systme has been incorporated into this large aperture standard zoom 18-50mm F2.8 EX DC MACRO. This lens is capable of autofocusing with all Nikon DSLR cameras ( inculding the D40 and D40x). Aspherical lens, SLD lens and ELD (Extraordinary Low Dispersion) provide high picture quality throughout the entire zoom range. Super Multi Layer Coating reduces flare and ghosting. High image quality is assured throughout the entire zoom range.
Layer Coating and lens power layout provide high picture quality throughout the entire zoom range.
SPECIFICATIONS Lens Construction
15 Elements in 13 Groups
Angle of View 76.5 - 31.7 degrees (Sigma SD format) Number of Diaphragm Blades 7 BladesMinimum ApertureF22Minimum Focusing Distance 20cm/7.9 in.Maximum Magnification 1:3Filter Size Diameter 72mmDimensions Diameter 79mm perchè Length 85.3mm
3.1 in. perchè 3.4 in.Weight535g/18.9 ozCorresponding AF Mounts NIKON