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Multicoated will prevent flaring and ghosting and some of the newer multicoated ones will even be easier to clean (keeping oil and water off). Highly recommended. I personally have witnessed a difference between Hoya and B+W, but I think it really depends on different shooting situations and you have to be really pixel peeping. Honestly, Hoyas are excellent for the money, but if you can afford it, the German companies are honestly better IMHO.