Super telephoto zoom lens series walimex pro lens mount t2 lens speed 8 focal length 650 1 300 mm suitable for sensor type aps c construction zoom lens area of use astrophotography animal photography focus manual focus internal focus af motor no internal af motor closest focusing distance 500 cm focal length equivalent to 35mm camera 650 1300 mm lens type aspherical lens construction groupselements 58 number of aperture blades 7 minimum apert