Sigma 85mm f/1.4 DG DN Art Lens for Sony E

This is a product description of a lens, likely a prime lens, with the following key features:

1. **E-Mount Lens/Full-Frame Format**: The lens is designed for use with Sony E-mount cameras and is compatible with full-frame sensors.
2. **Aperture Range: f/1.4 to f/16**: The lens has a wide aperture range of f/1.4 to f/16, allowing for control over depth of field and exposure.
3. **Five SLD Elements**: The lens contains five Special Low Dispersion (SLD) elements, which help to reduce chromatic aberration and improve image sharpness.
4. **One Aspherical Element, Four HR Elements**: The lens features one aspherical element and four High Refractive index (HR) elements, which help to correct for various types of aberration and improve image quality.
5. **Super Multi-Layer Coating**: The lens has a Super Multi-Layer coating, which helps to reduce flare and ghosting, and improves contrast and color accuracy.
6. **Stepping Motor AF System**: The lens features a Stepping Motor AF system, which provides fast and accurate autofocus performance.
7. **Customizable AFL Button**: The lens has a customizable AFL (Auto Focus Lock) button that can be assigned to various functions.
8. **Physical Aperture Ring; De-Click Switch**: The lens has a physical aperture ring that can be de-clicked using a switch, allowing for smooth and silent aperture control during video recording.
9. **Rounded 11-Blade Diaphragm**: The lens has a rounded 11-blade diaphragm that produces a smooth and pleasing bokeh (out-of-focus area).
10. **Weather-Sealed Design**: The lens has a weather-sealed design that protects it from dust and moisture, making it suitable for use in harsh environments.

Overall, this lens appears to be a high-quality prime lens designed for use with Sony full-frame cameras, with features such as fast autofocus, excellent image quality, and durability.


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This is a product description of the Sigma 85mm f/1.4 DG DN lens, a prime lens designed for full-frame Sony E-mount mirrorless cameras. Here are the key features mentioned:

1. **Portrait-length lens**: The lens is a portrait-length lens with a focal length of 85mm, equivalent to 127.5mm on APS-C cameras.
2. **Bright f/1.4 maximum aperture**: The lens has a bright maximum aperture of f/1.4, making it suitable for working in available light conditions and providing extensive control over depth of field.
3. **Advanced optical design**: The lens features an updated optical design with five Special Low Dispersion (SLD) elements and one aspherical element, which helps to reduce chromatic aberrations, color fringing, 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.
5. **Stepping motor autofocus**: The lens features a stepping motor autofocus system that provides quick and quiet focusing performance, complemented by an optimized AF algorithm for smoother focusing.
6. **Manual aperture ring with de-click switch**: The lens has a manual aperture ring that can be de-clicked for smooth, silent aperture switching during video recording, and a dedicated aperture ring lock switch to prevent accidental shifting of the aperture setting.
7. **Autofocus-Lock (AFL) button**: The lens has a built-in AFL button that can be assigned additional functions, widening the range of operations available on the lens.
8. **Rounded eleven-blade diaphragm**: The lens features a rounded eleven-blade diaphragm that contributes to a smooth and pleasing bokeh quality.
9. **Weather-resistant construction**: The lens has a weather-resistant design with a brass bayonet that provides improved mounting accuracy and rigidity.

Overall, this lens is designed for creative and artistic applications, offering advanced optical performance and a sleek profile. Its bright f/1.4 maximum aperture and advanced autofocus system make it suitable for portrait photography, while its weather-resistant construction ensures durability in harsh environments.