Magnesium work
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Magnesium work

Even before Sigma had decided to build the fp in-house, it purchased machines to finish the magnesium alloy components for its lenses and cameras. Previously, this was done by outside suppliers, but with ever tighter requirements for tolerances, Sigma decided it was best to do the finishing in-house, where it could take greater control.

In this image, an employee monitors a machine which is busy milling a portion of a Sigma fp's body shell.