Fujinon XF10-24mmF4 R OIS Equivalent to 15-36 mm (35mm format) - angle of view: 110 - 61.2 Minimum working distance of 0.24 m, Focal Length : 10-24 mm Constant f:4 aperture throughout entire zoom range, OIS (built-in Optical Image Stabilisation) 14 elements in 10 groups (includes 4 aspherical and 4 extra low dispersion elements) Internal focussing and zoom - lens extension and length remains constant throughout zoom range