Here are the first leaked images and specs of the Sigma 10-18mm f/2.8 lens that will be announced on October 5: Specifications: Lens construction: 13 elements in 10 groups (3 FLD, 1 SLD and 4 aspherical elements) Angle of view: 109.7°-76.5° (APS-C) Number of diaphragm blades: 7 (rounded diaphragm) Minimum aperture: F22 Minimum focus … Continue reading LEAKED: First Sigma 10-18mm f/2.8 images