Imaging recource: Caffeine Priority: Taking the (ultra-fast) Sigma 20mm f/1.4 and the Canon 5DS out for a mid-autumn stroll

    We couldn't wait to get the Sigma 20mm f/1.4 into our lab, now among the fastest primes to venture that wide an angle, but it never made it to the lab. It did though make it into my camera bag, along with a "gone-missing" Canon 5DS body. (I figured nobody would notice at least for a few days! I've heard the common question: "Why do you need a large aperture on a prime lens made for landscape work. anyway?" And that's a good question, as most landscape photographers use tripods and opt to stop way down for their work. But, wide...
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