Bright f/ 1.7 maximum aperture suits working in low-light conditions and also affords greater control over depth of field.; 9 groups 11 piece optical structures, including 4 ED lens and 3 high refraction index lens.; Supports EXIF information transmission and USB upgrade, more natural shots of subjects are possible thanks to the near-silent shutter sound.; The lens weight only 157g, its lightweight design makes it ideal for travel and everyday use, and is well compatible with your fujifilm cameras.; The lens adopts STM stepper motor, which provide quiet autofocus experience and tend not to affect the photo or video shooting.