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Tamron 20mm f/2.8 Di III OSD M1:2 Lens for Sony E-mount

All Products Camera Lenses Tamron
  • Direct Import - This product is an international version. Learn more
  • E-Mount Lens/Full-Frame Format
  • Three Low Dispersion Elements
  • Water-Resistant Design, Fluorine Coating


Tamron's 20mm f/2.8 Di III OSD M 1:2 Lens from their full-frame mirrorless E-mount lineup is a flexible wide-angle prime lens. By using an OSD stepping motor, fast and near-silent autofocus is achieved along with full time manual focus override. Furthermore, the lens features a moisture-resistant design coupled with a fluorine coating to accommodate working in rainy conditions. Its diminutive and lightweight profile makes it ideal for everyday b-roll and walkaround shooting despite its moderately bright maximum aperture. With a maximum magnification ratio of 1:2 and a 4.3-inch minimum focusing distance, it is also versatile enough to work with close-up subjects.

Key Features

  • An aspherical moulded glass element suppresses distortion and spherical aberrations, thus ensuring greater accuracy and sharpness.
  • Attractive bokeh quality is created by a seven-blade diaphragm.
  • This lens offers a 1:2 maximum magnification capable of working with close-ups, as well as a minimum focusing distance of 4.3" to accommodate close-ups.
  • In addition to offering quiet, fast, and precise autofocus performance, the OSD stepping motor allows full-time manual focus override.
  • Lens elements have been coated with BBAR (Broad-Band Anti-Reflection) to reduce reflections and prevent lens flare and ghosting for enhanced colour accuracy and contrast.
  • This lens' moisture-resistant design makes it suitable for use in inclement weather, and a fluorine coating on the front of the lens minimizes dust, dirt, and smearing.
  • There is three Low Dispersion (LD) elements designed to reduce chromatic aberrations and colour fringing in order to increase clarity and colour fidelity.
  • It provides a 30mm equivalent focal length when used with Sony E-mount mirrorless cameras, however, and can also be used with APS-C models.
  • In addition to being modestly bright, a maximum aperture of f/2.8 is also highly compact and lightweight, so that it can be utilized in any lighting condition.


Focal Length 20mm
Maximum Aperture f/2.8
Minimum Aperture f/22
Lens Mount Sony E
Format Compatibility Full-Frame
Angle of View 94° 30'
Minimum Focus Distance 4.3" / 10.92 cm
Maximum Magnification 0.5x
Macro Reproduction Ratio 1:2
Optical Design 10 Elements in 9 Groups
Diaphragm Blades 7, Rounded
Focus Type Autofocus
Image Stabilization No
Filter Size 67 mm (Front)
Dimensions (ø x L) 2.87 x 2.5" / 73 x 63.5 mm
Weight 7.8 oz / 221 g

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