Sigma has announced the new Macro 70mm f/2.8 EX DG lens, a medium telephoto macro lens that can be used on both 35mm and digital cameras. The company claims it performs from infinity to 1:1 macro through the use of a floating focus system. This model has a "Focus Limiter Switch" that limits the focus range to improve autofocus speed and accuracy. Like other Sigma products, this lens comes with a multi-layer lens coating to reduce flare and ghosting.
