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Monday, February 14, 2005
Sigma announces avalanche of lenses for digital SLR cameras

Sigma launches ten DG EX telephoto lenses. Sigma started production of wide-angle lens DG series in 2000.

This time ten new EX telephoto lenses including three single focus telephoto lenses will be introduced to market as DG lens series, which demonstrates high performance with digital single, lens reflex cameras. At the same time Sigma announces three DC series lenses, the Sigma 30mm F1.4 EX DC HSM, the Sigma 10-20mm F4-5.6 EX DC HSM and the Sigma 18-200mm F3.5-6.3 DC.

Sigma 30mm F1.4 EX DC HSM

This large aperture 30mm F1.4 EX DC HSM lens is designed to match the APS-C size image sensors of digital SLR cameras. Two SLD glass elements are especially effective in the compensation of magnification chromatic aberration. Glass mold aspherical lens at rear group of lens reduces color aberration and provides high-quality image results. From 40cm (15.7?) minimum focusing distance to infinity, this lens creates very sharp images with high contrast. The HSM models provide quiet high-speed auto-focus shooting, as well as full-time manual focus. Large Maximum Aperture of F1.4 can perform superbly in a great range of applications, including snapshots, portraiture, indoor shooting and landscape photography.


Focal Length :30mm
Minimum Aperture :F16
Lens Construction :7 Elements in 7 Groups
Angle of View :45 degree
Number of Diaphragm Blades :8pcs
Minimum Focusing Distance :40cm (15.7?)
Maximum Magnification :1:10.4
Filter Size :62mm
Lens Hood :Petal Hood
Dimensions :Diameter 75.5mm (2.97?) x Length 59mm (2.3?)
Weight :TBD

Sigma 10-20mm F4-5.6 EX DC HSM

The 10-20mm F4-5.6 EX DC HSM lens allows enjoyment of super wide-angle photography and it is a very powerful tool for indoor shooting and landscape photography with APS-C size image sensors of digital SLR cameras. Wide angle of view (102.4??at 10mm and 63.8??at 20mm) offers the photographer greater freedom of expression. Three SLD glass elements are employed for effective compensation of color aberration, which is a common problem with super-wide angle lenses. One piece of glass mold and two hybrid aspherical lenses, offer excellent correction for distortion, as well as all types of aberration. This lens is equipped with an inner focusing system, and the models which are equipped with HSM system provide quiet, high speed autofocus shooting and also offer full time manual focusing. It has a minimum focusing distance of 24cm (9.4?) at all focal lengths. The non-rotating lens barrel perfectly suits the petal shaped lens hood. A circular polarizing filter can also be used conveniently.


Focal Length :10-20mm
Minimum Aperture :F22
Lens Construction :14 Elements in 10 Groups
Angle of View :102.4 degree - 63.8 degree
Number of Diaphragm Blades :6 pcs
Minimum Focusing Distance :24cm (9.4?)
Maximum Magnification : 1:6.7
Filter Size :77mm
Lens Hood : Petal Hood
Dimensions :Diameter 83.5mm (3.3?)X Length 81mm (3.2?)
Weight :TBD

Sigma 18-200 F3.5-6.3 DC This high zoom ratio lens is exclusively designed for digital SLR cameras and capable of covering a wide range of focal lengths from wide-angle to telephoto. Two Special Low Dispersion (SLD) glass elements and two hybrid aspherical lenses offer the utmost correction for all types of aberrations, and enables this extended range super zoom lens to be housed in a compact and lightweight construction of 70mm (2.8in) diameter, and 78.1mm (3.1S) in length, and weighing just 405g/14.3oz. The new lens coating reduces flare and ghost, which is a common problem of digital cameras and also creates an optimum color balance. This lens has a minimum focusing distance of 45cm (17.7in) at all focal lengths and has maximum magnification of 1:4.4. The lens design incorporates an inner focusing system, which prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal shaped lens hoods. The overall length of the lens does not change during focusing, ensuring convenient handling and ease of use. A zoom lock switch eliminates ?zoom creep? during transportation, a convenient addition when traveling.


Focal Length :18-200mm
Minimum Aperture :F22
Lens Construction :15 Elements in 13 Groups
Angle of View :69.3degree- 7.1degree
Number of Diaphragm Blades :7pcs
Minimum Focusing Distance :45cm (17.7in)
Maximum Magnification :1:4.4
Filter Size :62mm
Lens Hood :Petal Hood
Dimensions :Diameter 70mm (2.8in) x Length 78.1mm (3.1in)
Weight :405gr/14.3oz

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