Imaging recource: Sigma 24-35mm f/2 ‘Art’ Lens Review: How does the world’s fastest full-frame zoom perform?

    We've been salivating over the Sigma 24-35mm f/2 DG HSM "A" since its announcement a month ago. Fortunately, Sigma gave us a chance -- albeit a brief one -- to get our hands on one of the new lenses and run it through our SLRgear test lab! This new zoom is the world's first constant-aperture f/2.0 zoom lens for full-frame DSLRs, which basically means you get three sharp f/2.0 primes -- 24mm, 28mm and 35mm -- in a single lens. Sigma is, once again, offering a unique lens that the major manufacturers simply do not offer! So, the...
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