Super telephoto lens series walimex pro lens mount four thirds 43 lens speed 8 focal length 500 mm suitable for sensor type four thirds 43 construction prime lens area of use close up photography animal photography focus manual focus af motor no internal af motor closest focusing distance 1 000 cm lens type aspherical lens construction groupselements 44 number of aperture blades 7 minimum aperture 32 max aperture 8 filter thread 67 mm