Compund eye of a European Hornet (Vespa crabro). The individual hexagonal ommatidia can be seen, tessellated to make up the curved surface of the compund eye. Each ommatidium consists of a photoreceptor cell, support cell and pigment cells. Sherwood Forest, Nottinghamshire, UK. November. Sherwood Forest, Nottinghamshire, UK. November. Focus stacked image. x80 life size when printed at 10cm across.