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Large
aperture standard zoom lens provides superior performance both for Digital
SLR Cameras and 35mm Film SLR Cameras.
To achieve an F2.8 aperture at all focal lengths, it employs three aspherical
Lens to provide optimum aberration compensation. Two Special Low Dispersion
(SLD) glass elements are provided for color aberration compensation, to
assure high image quality.
To achieve an F2.8 aperture at all focal lengths, it employs three aspherical
Lens to provide optimum aberration compensation. Two Special Low Dispersion
(SLD) glass elements are provided for color aberration compensation, to
assure high image quality.
Two SLD elements, one Glass Mold Aspherical plus two Hybrid Aspherical
lenses provide excellent correction of various aberrations and a high
level of optical performance.
The lens has a minimum focusing distance of 40cm at all focal lengths
and is capable of macro photography with a maximum magnification ratio
of 1:3.8.
This lens incorporates a Dual Focus (DF) system that is designed to make
the lens easy to hold during autofocusing, and yet provides a large focus
ring for easy manual focusing.
Since the front of the lens does not rotate, a Petal-type hood and circular
polarizing filters can be easily used.
