Description
This is a product description of the Sigma 105mm f/1.4 DG HSM Art lens for Sony E-mount cameras. Here are the key features mentioned:
1. **Short-telephoto prime**: The lens is a short-telephoto prime lens with a focal length of 105mm, designed for full-frame Sony E-mount mirrorless cameras.
2. **Bright f/1.4 maximum aperture**: The lens has an impressively bright maximum aperture of f/1.4, which allows for working in low-light conditions and provides greater control over depth of field.
3. **Advanced optical design**: The lens features three FLD (Fluorite Low Dispersion) elements and two SLD (Special Low Dispersion) elements to reduce color fringing and chromatic aberrations, and one aspherical element to limit distortion and spherical aberrations.
4. **Super Multi-Layer Coating**: The lens has a Super Multi-Layer Coating applied to the elements to minimize lens flare and ghosting, producing contrast-rich and color-neutral imagery, even in backlit conditions.
5. **Hyper Sonic Motor (HSM)**: The lens features a Hyper Sonic Motor that provides quick, smooth, and quiet autofocus performance with full-time manual focus override.
6. **Thermally Stable Composite (TSC) material**: The lens is constructed using TSC material, which provides greater precision and durability in a wide range of temperatures.
7. **Brass bayonet mount**: The lens has a brass bayonet mount that ensures accuracy and durability.
8. **Rubber sealing**: The mount design features rubber sealing to render it dust- and splash-resistant.
9. **Protective coating**: The front element has a protective coating that is both water- and oil-repellent to aid in cleaning.
10. **Rotating tripod collar**: The lens features a rotating tripod collar with an Arca-type compatible foot for seamless use atop a tripod or monopod.
11. **Lens hood**: The lens hood is constructed from carbon fiber reinforced plastic to remain lightweight yet exceptionally durable.
Overall, this lens appears to be a high-end prime lens designed for professional photographers who require exceptional optical performance, fast autofocus, and robust build quality.
