Sigma 28-70mm f2.8 EX Aspherical | $219.95 | | |
It features a fast, constant maximum aperture of F2.8 and covers the popular focal length range of 28mm wide angle to 70mm mid-range telephoto. Two aspherical elements help maintain its high optical performance throughout its zoom and focus ranges. It is
the world's smallest zoom lens in this category, just 3.9" in length. A minimum focusing distance of just 15.7 inches, at all focal lengths, also gives it the world's shortest close focusing capability. The 28-70mm F2.8 EX incorporates helical focusing to
eliminate front lens barrel rotation during focusing, for added convenience when using polarizing filters.
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