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Sigma Corporation has introduced their new Macro 70mm F2.8 EX DG lens. The 70mm focal length gives users an equivalent field of view as the company’s 105mm macro lens when used on digital SLR cameras with an APS-C size image sensor.
The design of this lens is said to make it suitable for taking pictures in all situations from infinity to 1:1 macro, both with natural light conditions or flash.
A Special Low Dispersion (SLD) lens and two high refractive index SLD lenses provide excellent correction for all types of aberrations and produce an exceptional level of optical performance. Sigma’s super multi-layer lens coating reduces flare and ghosting, and helps create a natural color balance.
The floating focus system is said to provide extremely high optical performance from infinity to 1:1 Macro.
A ‘Focus Limiter Switch’ in incorporated on the lens, improving the speed and accuracy of autofocus by limiting the focus range. A screw-in lens hood is included for convenient use of circular polarizing filters.
The new lens fits Canon, Nikon Pentax, Sigma and Sony lens mounts. The Sigma AF, Canon EOS and Nikon AF will be available in August 2006. The Sony and Pentax AF will be announced at a later date. The Macro 70mm F2.8 EX DG lens will have and MSRP of $570.
Sigma claims this medium telephoto macro lens is said to be ideal for both digital SLR and 35mm film SLR cameras; however, the announcement also states that: "Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras." We will be posting test results as soon as we get a testable unit in the lab.
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