SIGMA 18-300MM F/3.5-6.3 DC MACRO OS HSM CONTEMPORARY
At Sigma, they have an eye for detail.
Practically all lenses are built out of a combination of plastic and metal. Practically all plastics expand differently when heated than metal does. That also applies for shrinkage at lower temperatures. The differences are small, but they do have an effect on the optical performance of a modern lens, often with complex lens designs that consist of many elements. Sigma has a solution. They have discovered a thermally stable composite material that responds to temperatures changes in the same way as the metal in the lens. The optical performances therefore remain constant, whether you want to take pictures in the Sahara or at the North Pole. With an optional USB dock, you can install future software updates yourself, without having to rely on someone else. And a macro conversion lens designed especially for the Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary is for sale as an accessory.
Like I said, at Sigma they have an eye for detail.