Sigma 12-24mm f/4.5-5.6 EX DG Aspherical (Pentax AF) £443.99
The Sigma 12-24mm f/4.5-5.6 has a large angle of view (122 degrees super wide angle of view at 12mm along the diagonal axis) and is ideal for shootings indoor as well as landscape photography. It has a variable angle of view from 122 degrees at 84.1 degrees. Four Special Low Dispersion (SLD) glass elements are provided for effective compensation of colour aberration, which is a common problem with super-wide angle lenses. Two pieces of Gl