| As part of the Art line within Sigma's Global Vision series, this lens is designed to achieve truly notable optical performance and is ideally suited for creative and artistic applications. |
| Prime wide-angle lens is designed for full-frame Canon EF-mount DSLRs, however it can also be used on APS-C models where it will provide a 22.4mm equivalent focal length. |
| Bright f/1.8 maximum aperture is well-suited for working in low and difficult lighting conditions. |
| Three F Low Dispersion (FLD) and four Special Low Dispersion (SLD) elements are featured in the optical design, and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy. |
| Four aspherical elements, including one large, 80mm-diameter precision-molded glass aspherical element, help to minimize distortion and spherical aberrations for improved sharpness. |
| A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions. |
| The integrated HSM (Hyper Sonic Motor) realizes quick and quiet autofocusing, which is further complemented by an optimized AF algorithm to produce smoother focusing performance. The HSM also permits full-time manual focus control simply by rotating the focus ring at any time. |
| The lens is constructed using a Thermally Stable Composite (TSC) material, along with traditional metals, for greater precision and use in wide temperature variations. |
| The bayonet mount is constructed from brass for ensured accuracy and durability. Additionally, rubber sealing is incorporated in the mount design to render it dust- and splash-resistant. |
| This lens is compatible with the optional Sigma USB Dock for fine-tuning different lens characteristics and updating its firmware. |
| EF-Mount Lens/Full-Frame Format |
| Aperture Range: f/1.8 to f/16 |
| Three FLD Elements, Four SLD Elements |
| Four Aspherical Elements |
| Super Multi-Layer Coating |
| Hyper Sonic AF Motor, Manual Override |
| Rounded 9-Blade Diaphragm |
| TSC Material, Brass Bayonet Mount |
| Compatible with Sigma USB Dock |
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People who buy this are buying it for a purpose. The average hobbyist doesn't need it. Still a good price for this specific product.
People who buy this are buying it for a purpose. The average hobbyist doesn't need it. Still a good price for this specific product.
Compare MTF charts with other lenses you're considering, if you want raw data. Typically super wide, wide open, the image will have a vignette of softness with a sharp center. Usually having incredibly sharp images by the time you hit 2.8 or 4.0... Where you'd have to stop down a cheaper 2.8 lens to 5.6 or 8.
When they work right, the metabones adapters to a smaller sensor are phenomenal, because it crops the softest/distorted areas out (but also makes it a 20mm or so). Ehh, everything's always a tradeoff.
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