The voigtlander 425mm f095 nokton lens is a bright medium telephoto prime lens with selective aperture control system for use with micro four thirds compact system cameras this portrait length lens with bright f095 aperture provides a 35mm equivalent focal length of 85mm making it great for capturing unique and sharp images with an extremely narrow depth of field and soft natural bokeh background the selective aperture control system is ideal for video enthusiasts who like to use silent