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Pentax Super Takumar 50mm F/1.4 M42 Mount Lens Review - Casual Photophile
Eight elements. Eight. The original Zeiss Planars got by with just six, the Planar T* of the 1970s used seven. Minolta, Canon and Nikon all used seven elements in their fifties. Pentax themselves reverted to seven after just two years of producing an eight-element 50mm lens. Seven seems to work. Why then, did Pentax ever …