The Tamron 20mm f/2.8 Di III OSD M 1:2 Lens for Sony E is a sleek, ultra-wide prime built for full-frame Sony E-mount mirrorless cameras, delivering exceptional image quality in a compact, lightweight body. With its f/2.8 maximum aperture, three Low Dispersion elements, one aspherical element, and BBAR coating, this lens produces sharp, high-contrast images free from chromatic aberration, flare, and ghosting — making it an ideal everyday wide-angle companion.
Beyond traditional wide-angle photography, the Tamron 20mm f/2.8 Di III stands out with a remarkable 1:2 macro magnification ratio and a 4.3-inch minimum focusing distance, opening the door to striking close-up work. The OSD stepping motor ensures fast, quiet, and precise autofocus, while a moisture-resistant construction and fluorine-coated front element keep the lens protected in challenging shooting conditions.
Key features
- Ultra-Wide Full-Frame Prime: 20mm focal length designed for Sony E-mount full-frame cameras, also usable on APS-C bodies for a 30mm equivalent field of view.
- Impressive Close-Up Capability: 1:2 half life-size maximum magnification with a 4.3-inch minimum focusing distance lets you shoot compelling macro-style images without a dedicated macro lens.
- Superior Optical Performance: Three LD (Low Dispersion) elements and one molded glass aspherical element minimize chromatic aberrations, distortion, and spherical aberrations for outstanding sharpness and color fidelity.
- Fast, Silent Autofocus: OSD stepping motor delivers quick, precise, and near-silent autofocus with full-time manual focus override — perfect for both stills and video.
- All-Weather Durability: Moisture-resistant construction and a fluorine-coated front element protect against dust, dirt, smears, and inclement weather for reliable performance in the field.
- Beautiful Bokeh: A rounded 7-blade diaphragm produces smooth, aesthetically pleasing out-of-focus backgrounds to make your subjects pop.
Specifications
| Mount | Sony E-Mount (Full-Frame) |
|---|---|
| Focal Length | 20mm |
| Maximum Aperture | f/2.8 |
| Aperture Range | f/2.8 to f/22 |
| Maximum Magnification | 1:2 (Half Life-Size) |
| Minimum Focus Distance | 4.3 inches |
| Autofocus Motor | OSD Stepping Motor |
| Optical Construction | 3 LD Elements, 1 Aspherical Element |
| Diaphragm Blades | 7 (Rounded) |
| Weather Sealing | Moisture-Resistant with Fluorine Coating |
Frequently asked questions
Is the Tamron 20mm f/2.8 Di III compatible with Sony APS-C mirrorless cameras?
Yes, while the lens is designed for full-frame Sony E-mount cameras, it is also compatible with APS-C Sony E-mount bodies, where it provides a 30mm equivalent focal length.
Can this lens be used for macro or close-up photography?
Absolutely. The Tamron 20mm f/2.8 Di III features a 1:2 half life-size maximum magnification ratio and a minimum focusing distance of just 4.3 inches, making it well-suited for close-up and near-macro shooting.
Does the Tamron 20mm f/2.8 Di III have weather sealing?
Yes, the lens features a moisture-resistant construction to handle shooting in wet or dusty conditions, and the front element is treated with a fluorine coating to resist dust, dirt, and smearing.
