A constant f/1.7 aperture across the 25-50mm zoom range delivers exceptional low-light performance and depth of field control on a Micro Four Thirds system. The rugged, weather-sealed build and stepless, de-clicked aperture ring make it equally suited for stills and silent video operation. This lens is best for portrait and event photographers who need a bright, 50-100mm equivalent telephoto zoom with uncompromising optical quality.
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