The Voigtlander E NOKTON 75mm F1.5 Aspherical is a large aperture manual focus portrait lens optimized for the image sensor of Sony E system cameras.　 The lens construction consists of 7 elements in six groups, one of which is a double-sided aspherical element. Despite its compact size, the lens achieves an astonishingly large F1.5 aperture.　 The Z 75mm F1.5 offers outstanding optical performance with very gentle out-of-focus bokeh. Beautiful bokeh effect with 12 aperture blades for outstanding portraits.