The Sigma sd Quattro H is an interchangeable-lens mirrorless camera for SA mount lenses featuring the Foveon X3 Quattro APS-H sensor with a unique 1.3x crop format and 51 megapixels at the top layer for the highest resolution Foveon sensor available. It shares the H-shaped ergonomic body of the sd Quattro lineup and supports the full SA lens range. The sd Quattro H offers the largest Foveon sensor in a Sigma mirrorless body.