The Tamron 24mm f/2.8 Di III OSD M 1:2 is a lightweight wide-angle prime lens designed for full-frame Sony E-mount mirrorless cameras. The f/2.8 maximum aperture keeps the lens compact. It can also be used on APS-C models, where it gives a 36mm equivalent focal length.
The optical design has three LD (Low Dispersion) elements to reduce chromatic aberrations and color fringing. One molded glass aspherical element suppresses distortion and spherical aberrations. A BBAR (Broad-Band Anti-Reflection) coating on the lens elements reduces surface reflections, lens flare and ghosting. A rounded seven-blade diaphragm shapes the bokeh.
The lens has a 1:2 maximum magnification ratio (half life-size) and a 4.7" minimum focusing distance for close-up subjects. An OSD stepping motor provides fast, near-silent autofocus with full-time manual focus override. The construction is moisture-resistant, and a fluorine coating on the front element protects against dust, dirt and smearing.
- Focal length
- 24mm (36mm equivalent on APS-C)
- Maximum aperture
- f/2.8
- Mount
- Sony E
- Format
- Full-frame mirrorless; also suits APS-C
- Max magnification
- 1:2 (half life-size)
- Min focus distance
- 4.7"
- Autofocus
- OSD stepping motor with full-time manual focus override
- Lens elements
- 3 LD elements, 1 molded glass aspherical element
- Coatings
- BBAR coating; fluorine coating on front element
- Diaphragm
- Rounded 7-blade
- Weather resistance
- Moisture-resistant construction