Pentax SMC Pentax-M 40-80mm f/2.8-4 Macro - Pentax K Mount
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Pentax SMC Pentax-M 40-80mm f/2.8-4 Macro - Pentax K Mount
A compact K-mount manual focus zoom lens with a fast f/2.8 wide end and macro functionality.
The SMC Pentax-M 40-80mm f/2.8-4 is an unusual variable-aperture zoom from the M-series era, featuring a close-focusing 'Macro' capability at the 80mm end. It offers a relatively fast f/2.8 maximum aperture at the wide end, which was uncommon for zooms of its size. The lens uses a two-ring design for separate control of zoom and focus.
When purchasing used, the macro engagement mechanism should be tested to ensure it locks and unlocks correctly. The zoom action should be smooth without excessive 'zoom creep'. SDS thoroughly checks the internal optics for any signs of separation or balsam failure, which can occasionally affect complex zoom designs of this vintage.
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