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This large-aperture wide-angle lens is
equipped macro focusing capability with a maximum magnification of 1:2.7
and fast F1.8 maximum aperture. The use of aspherical lenses are offered
for superior peripheral brightness and compensation of aberrations and
astigmatism. This is an ideal DG lens for Digital SLR cameras.
This lens is capable of Macro photography at minimum focusing down to
18cm (7.1 inch) (reproduction ratio 1:2.7). It incorporates the floating
focus system in order to minimize distortion, spherical aberration and
astigmatism, which provide high performance at all shooting distance down
to 18 cm (7.1 inch). Reproduction ratio 1:2.7 and an angle of view of
84.1allow capturing of high quality images not only a subject but also
the surrounding scenery.
This lens has an advanced optical construction, in order to obtain adequate
peripheral brightness at open aperture. Also, the iris diaphragm has 9
diaphragm blades to obtain beautiful out of focus images in the foreground
and background.
This lens also incorporates a Dual-Focus (DF) 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. Also this allows the use of a "Petal-type Hood"
, which is superior light blocking effect.
It incorporates a floating focus system and uses two aspherical lens elements
for minimizing distortion, spherical aberration and astigmatism.
