 Sigma 70mm f2.8 EX DG - Coating
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. A Focus Limiter Switch in incorporated on the Sigma 70mm f2.8 lens, improving the speed and accuracy of auto focus by limiting the focus range. A screw-in lens hood is included for convenient use of circular polarizing filters.
Sigma 70mm F2.8 EX DG features
• Special Low Dispersion (SLD) lens and two high refractive index SLD lenses
• Excellent correction for all types of aberrations
• Super multi-layer lens coating reduces flare and ghosting
• Floating focus system
• Extremely high optical performance from infinity to 1:1 Macro
• Equivalent field of view to 105mm macro lens when used on a digital SLR camera with an APS-C size image sensor
Sigma macro 70mm F2.8 EX DG specifications
• Focal length: 70mm
• Minimum aperture: F22
• Lens construction: 10 elements in 9 groups
• Angle of view: 34.3°
• Number of diaphragm blades: 9 pcs
• Minimum focusing distance: 25.7cm (10.1")
• Maximum magnification: 1：1
• Filter size: 62mm
• Lens hood: screw-in type
• Dimensions: diameter 76mm (3.0in") x length 95mm (3.7")
• Weight: 525g/18.5oz
About Sigma
After nearly 40 years of pioneering new and better ways to capture and portray the ordinary - and extraordinary - Sigma is still creating new avenues of expression with innovative designs and enhancements in zoom and non-zoom lenses and single lens reflex cameras. As one of the first manufacturers to successfully introduce the interchangeable lens, Sigma's well-earned reputation for originality, innovation and leadership is your guarantee of the world's most advanced line of photographic products. Products you and millions of photographers worldwide turn to when quality, reliability and professional results count most.
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Sigma macro 70mm F2.8 EX DG lens : The Sigma Corporation is pleased to announce the launch of the new MACRO 70mm F2.8 EX DG lens. The Sigma medium telephoto macro f/2.8 70mm EX DG lens is ideal for both digital SLR cameras and 35mm film SLR cameras. The 70mm focal length gives an equivalent field of view as our popular 105mm macro lens when used on digital SLR cameras with an APS-C size image sensor. The design of the Sigma 70mm F2.8 EX DG macro lens makes it suitable for taking pictures in all situations from infinity to 1:1 macro, both with natural light conditions or flash. The floating focus system of the Sigma macro 70mm f2.8 lens provides extremely high optical performance from infinity to 1:1 Macro. 
