Sigma USA a anuntat obiectivul 18-35mm F1.8 DC HSM Art pentru DSLR-uri APS-C – primul obiectiv zoom cu F1.8 constant – va fi disponibil din iulie la un pret de $799. Intre timp, pretul recomandat va fi de £799.99 in UK, si €999 in Europa. Compania a mai anuntat ca obiectivul va fi disponibil pentru monturi Pentax si Sony, dar si Canon, Nikon si Sigma anuntate original. Acopera un interval echivalent cu 27-52.5mm si ofera adancimea de camp a unui obiectiv F2.7 constant pe un body full-frame.
18-35

Specificatii Sigma 18-35mm F1.8 DC HSM

Principal specifications
Lens type Zoom lens
Max Format size APS-C / DX
Focal length 18–35 mm
Image stabilisation No
Lens mount Canon EF, Nikon F (DX), Pentax KAF, Sony Alpha, Sigma SA
Aperture
Maximum aperture F1.8
Minimum aperture F16.0
Number of diaphragm blades 9
Aperture notes Rounded diaphragm
Optics
Elements 17
Groups 12
Special elements / coatings 5 SLD glass elements, 4 glassmold aspherical elements
Focus
Minimum focus 0.28 m (11.02″)
Maximum magnification 0.23 x
Autofocus Yes
Motor type Ring-type ultrasonic
Full time manual Yes
Focus method Internal
Distance scale Yes
DoF scale No
Physical
Weight 810 g (1.79 lb)
Diameter 78 mm (3.07″)
Length 121 mm (4.76″)
Zoom method Rotary (internal)
Filter thread 72 mm
Hood supplied Yes
Hood product code LH780-03

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