Almost six months after Nikon announced its P500 36x long-zoom, it finally has a direct rival in the form of Olympus' SP-810UZ. Like Nikon's camera, the Olympus SP-810 features a staggering 36x optical zoom lens, but it does so in a rather more compact body, and trading off some extreme wide angle reach for an even more powerful telephoto. 35mm-equivalent focal lengths range from 24mm at wide angle to 864mm at telephoto. Maximum aperture at wide angle is f/2.9, and at the telephoto end this falls to f/5.7; by comparison Nikon's...
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