Sigma 40mm F1.4 DG HSM Art Leica L-Mount

Sigma 40mm F1.4 DG HSM Art Lens for Leica L-Mount

Optical Design and Performance

• Wide normal-length lens with a bright f/1.4 maximum aperture for excellent low-light performance and shallow depth of field control.
• Incorporates three F Low Dispersion (FLD) and three Special Low Dispersion (SLD) glass elements to reduce chromatic aberrations and color fringing, enhancing clarity and color accuracy.
• One aspherical element minimizes distortion and spherical aberrations, improving overall sharpness and rendering precision.
• Super Multi-Layer Coating reduces flare and ghosting, ensuring high contrast and color neutrality even in strong or backlit lighting conditions.

Mechanical and Autofocus Features

• Equipped with a Hyper Sonic Motor (HSM) for fast, smooth, and quiet autofocus operation with full-time manual focus override by rotating the focus ring.
• Specialized electromagnetic aperture mechanism provides stable exposure control, especially beneficial during fast continuous shooting.
• Rounded nine-blade diaphragm produces smooth and pleasing bokeh quality.
• Brass bayonet mount ensures precise, durable lens attachment and includes rubber sealing for dust and splash resistance.
• Front element features water- and oil-repellent protective coating for easier cleaning.

Additional Features

• Designed with cine lens-level tolerances for high optical and mechanical precision.
• Compatible with the optional Sigma USB Dock for firmware updates and fine-tuning of lens characteristics.