With the 300-600mm f/4 DG OS Sports, Sigma has reasserted itself as a major player in the world of super-telephoto zooms.
As an alternative to astronomically expensive full-frame wildlife photography setups, the Om System M.Zuiko Digital ED 150-600mm F5.0-6.3 IS certainly seems a compelling option on paper ...
Reviews / Sigma 150-600mm f/5-6.3 DG DN OS Sport Lens Review - Verdict ...
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The lens is noticeably better in this regard than the Sigma 150-600mm Contemporary lens, as can be seen below. The issue of coma — the aberration that results in off-axis point sources (like ...