The Sigma 20mm F1.8 EX DG Aspherical RF lens is to be a lot of fun to use. The minimum focusing distance on this Sigma 20mm wide-angle lens is crazy.
This super-wide-angle Sigma 20mm F1.8 EX DG lens is ensured minimal light-fall-off with superior peripheral brightness. The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background. The Sigma 20mm is an ideal lens optimized Digital SLR camera.
The Sigma 20mm F1.8 EX DG incorporates an aspherical lens element in the front as well as rear lens groups, to minimize distortion, spherical aberration and astigmatism. The lens has non-vignetting optical construction, in order to obtain adequate peripheral brightness with open aperture. This is especially desirable for digital cameras. The Sigma 20mm lens incorporates a rear focus system eliminating front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The Sigma 20mm also incorporates dual-focus mechanism. It is easy to hold the Sigma 20mm lens, since the focusing ring does not rotate during auto-focus, yet it 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.
see the Sigma 20mm F1.8 EX DG and full rage here
This product was added to our catalog on Sunday 29 March, 2009.
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