Tokina 11-16mm Specifications Recommended Sensor sizeAPS-C Sized (23.7 X15.6mm) CCD or CMOS sensor (w/1.5-1.6x magnification factor) (not designed for cameras with Full Frame sensors)Maximum ApertureF/2.8Minimum ApertureF/22Optical Construction13 Elements / 11 GroupsCoatingsMulti-layer CoatingsZooming SystemRotary-typeMinimum Focus Distance11.8 in. (30cm)Macro Ratio1:11.6Number of Diaphragm Blades9Filter Size77mmDimensions3.3 in. (84mm) X L 3.5 in. (89.2mm)Weight19.75 oz. (560g