The Tamron 20mm F/2.8 Di III OSD M 1:2 Sony E-mount lens is a flexible wide-angle lens designed for full-frame Sony E mirrorless cameras. This lens uses a modestly bright maximum aperture to achieve a slim, lightweight profile that is ideal for everyday, walkaround shooting. Also contributing to its versatility is a half-size 1:2 maximum magnification ratio and a minimum focus distance of 4.3″ for working with close subjects.
The Tamron 20mm F/2.8 lens has an OSD stepper motor for fast and near-silent autofocus performance, along with full-time manual focus override. In addition, the lens has a moisture-resistant physical design along with a fluorine coating to adapt to working in inclement conditions.