All About Photographic Lenses. Specifications, comparison, reviews, MTF-charts for lenses by Canon, Nikon, Sony, Pentax, Olympus, Sigma, Tamron, Carl Zeiss, etc.
The Mamiya-Sekor E 50mm 1:1.7 S is one of two lenses offered as a kit lens for the ZM Quartz when it was introduced in 1982. It has the same optical configuration as the E and EF versions, but a larger physical size, different electronic features, and subtly different coating.
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