Sigma 50 100mm f18 dc hsm art nikon f
Telephoto zoom lens series sigma art sigma dc lens mount nikon f lens speed 18 focal length 50 100 mm zoom factor 2 times suitable for sensor type aps c construction zoom lens area of use portrait photography indoor photography news photography street photography action photography night photography sports photography focus internal focus auto focus manual focus af motors ultrasonic motor usm hyper sonic motor hsm circular aperture closest focus