This 18mm f/2.8 wide-angle prime lens is designed for APS-C-format L-mount mirrorless cameras and provides a 27mm equivalent focal length. Four aspherical surfaces are featured in the optical design to control distortion and spherical aberrations for greater sharpness and clarity. Pancake form factor measures just 0.8" thick for an ultra compact, sleek option well-suited to everyday shooting. Autofocus design affords full-time manual focus control along with a minimum focusing distance of 11.8". The new Leica Elmarit-TL 18mm f/2.8 ASPH. is not only one of the most smallest lenses in its class, it also by far exceeds the imaging performance of its competitors. With a length of only 20.5 millimetres, a weight of no more than 80 grams and fast autofocus, this wide-angle is the perfect ?constant companion? for the compact Leica CL. Angle of view (diagonal, horizontal, vertical) Approx. 75�, 65�, 46�, corresponding to around 27 mm focal length in 27 mm format Optical design Number of lenses/groups: 8/6 Aspherical surfaces: 4 Position of entrance pupil (at infinity): -12.5 mm (in direction of light incidence in front of bayonet mount) Distance setting Setting/Function: Electronically controlled Mode selectable using camera menu: Automatic (AF) or manual (M), in AF mode manual override possible at any times with setting dial Focusing range: 0.3 m to 8 Smallest object field/largest scale: approx. 343 x 228 mm/1:14