Sigma 17-40mm f/1.8 DC Art with Autofocus and Dual AFL Buttons (L Mount) 10G Ethernet 4 aperture is not only

4 aperture is not only good for shallow depth of field

The lens housing is made of aluminum alloy

custom-built driver delivers crisp

Final achieves snugly fit by using the right materials and tested know-how: employing synthetic leather

The MD-LX converter can also be controlled via USB on Mac/Windows Applications

Sigma 17-40mm f/1.8 DC Art with Autofocus and Dual AFL Buttons (L Mount) 10G Ethernet 4 aperture is not onlyHeir to the revolutionary innovations of the acclaimed Sigma 18 35mm F1. 8 DC HSM Art the industrys first F1. 8 zoom the Sigma 17 40mm F1. 8 DC Art offers, thirteen years later, superior optical performance. It does so with a wider focal range and significantly lighter weight, features that increase the versatility of this large aperture standard zoom. In addition to fast and silent autofocus powered by the HLA (High response Linear Actuator), this