Wide Angle 20mm f/1.8 EX Aspherical DG DF RF AF Lens
:: Brand New, 4
Year Sigma USA Warranty ::
This 20mm is a Super wide-angle
lens with a large aperture of f/1.8 and angle of view 94.5. It has Macro focusing
capability with a minimum focusing distance of just 7.9", for a reproduction ratio
of 1:4. The 9-bladed iris diaphragm obtains beautiful out of focus image characteristics.
Aspherical lens elements in the front & rear lens groups minimize distortion, spherical
aberration and astigmatisms. The lens has non-vignetting optical construction in
order to obtain adequate peripheral brightness with wide apertures-especially desirable
for digital cameras. The lens incorporates a rear focus system eliminating front
lens rotation. The focusing ring does not rotate during autofocus yet provides adequate
focusing torque of the focusing ring during manual focusing of the lens. The lens
materials used in this new lens are lead and arsenic free ecological glass.
Includes: Front & Rear Caps,
Lens Hood, Case, 1-Year Worldwide Warranty + 3-Year Extended USA Warranty