Sigma 35mm 1.4 DG HSM

The Sigma 35mm F/1.4 DG HSM A1 is the first lens introduced in Sigma's new line of Art lenses. It features 13 elements in 11 groups; focusing is done through Sigma's HSM (Hyper Sonic Motor) system. This ensures silent and quick focusing, this system puts it on par with the focusing system used in higher-end Nikon and Canon lenses. I love the 35mm focal length because it is wider than a 50mm but doesn't have the distortion of wider lenses. On a full-frame body this lens is perfect for "environmental portraits", it's an excellent choice when you want to show off a subject as well as their environment. Sigma also has a USB interface that will allow firmware updates on the lens to be carried about by the user. This solves one of my biggest issues with aftermarket lenses; often times firmware updates are necessary to maintain compatibility with new camera bodies. The new USB interface will allow such updates to be carried out without having to send your lens in to the manufacturer. Stay tuned, soon I will be comparing this lens to the Nikon and Canon variants.