Anybody seen/tested one?
The web reads:
"SIGMA 20mm F1.8 EX DG ASPHERICAL RF is one of several EX-Series lenses to be
introduced
at Photokina 2000 by Sigma Corporation of Japan (2-13-15, Iwado-Minami, Komae-shi,
Tokyo).
It is the first 20mm Super wide-angle lens in the world with a large aperture of F1.8
and
angle of view 94.5°. It has Macro focusing capability with a minimum focusing distance
of
20cm/7.9inches (reproduction ratio 1:4). The iris diaphragm has 9 diaphragm blades to
obtain beautiful out of focus image. It 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 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 lens also
incorporates dual-focus mechanism. It is easy to hold the 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. Available November 2000."
Comments?
PS: "ecological glass": That's cool!
Best wishes
Wieland
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