Extend the reach of select L-mount lenses with the Sigma TC-1411 1.4x Teleconverter. This optic magnifies the image by 1.4x and retains full communication between the lens and camera body, enabling metering, autofocus, and image stabilization as well as the transmission of Exif data. Lens Compatibility: 100-400mm f/5-6.3 DG DN OS Contemporary Technical Specifications: Mount Leica L Magnification 1.4x Light Loss 1 Stop Packaging Info: Package Weight 0.4 kg Box Dimensions (LxWxH) 3.8 x 3.8 x 3.7" In the Box: Sigma TC-1411 1.4x Teleconverter for Leica L Front and Rear Caps Limited 1-Year Warranty