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Compact 20mm f/2.8 lens, matte black barrel with silver accents

Tamron

Tamron 20mm F2.8 Di III OSD M1:2 Lens Model F050 camera lens

SKU CH-2S2M-QCXK2 MPN F050

Wide 20 mm prime for Sony E-mount with f/2.8 aperture and 1:2 close-up capability

  • Focus systemAuto Focus
  • Product typeCap & Hood
  • Compatible withPentax
  • Product colorClear
  • Key featuresDustproof
  • Ultra-wide 20mm view captures expansive scenes
  • Bright F2.8 aperture excels in low-light conditions
  • Close 1:2 magnification reveals fine details
  • Compact lightweight design suits travel photography
  • Fast OSD autofocus tracks moving subjects smoothly

Wide-Angle Prime for Sony E-Mount

The Tamron 20mm F2.8 Di III OSD M1:2 is a compact full-frame prime lens built for Sony E-mount mirrorless cameras. It delivers an ultra-wide 20mm field of view with a bright F2.8 maximum aperture. Autofocus is driven by an OSD motor for quiet operation. The lens features dustproof construction and fluorine coating on the front element.

Landscape, Architecture and Street Shooters

This lens suits photographers who need a lightweight wide-angle prime for environmental work and low-light scenes. The 1:2 magnification ratio supports close-up detail capture. It is not for users who require zoom versatility, longer focal lengths or weather-sealed construction for harsh conditions. Buyers needing optical stabilisation for video should look elsewhere.

20mm F2.8 Ultra-Wide Field of View

The 20mm focal length combined with an F2.8 aperture defines the lens's core capability for expansive compositions and shallow depth of field. This specification determines suitability for astrophotography, interiors and creative street work. The M1:2 close-focus ability extends its use beyond traditional wide-angle subjects.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $232.99
Cheaper than about 82% of the 2,570 comparable items (median $546.49).

Specifications

Product
Brand nameTAMRON
Model nameTamron 20MM f/2.8
Product typeCap & Hood
Product colorClear
Audio & video
Focus systemAuto Focus
Compatibility
Compatible withPentax

Questions about this item

How is the lens attached to a Sony E-mount camera, and which step is often missed?

Align the white mounting index on the lens barrel with the matching mark on the camera body, then rotate clockwise until it clicks; the step people miss is removing both the rear lens cap and the camera body cap before mounting.

What regular maintenance will the Tamron 20mm F2.8 Di III OSD M1:2 require?

Clean the front element periodically using a blower and microfibre cloth; the Fluorine coating resists water and oil, so only gentle wiping is needed to maintain optical clarity.

What is the closest focusing distance this 20mm F2.8 lens can achieve?

The lens delivers a 1:2 magnification ratio, allowing close-up capture of fine details at half life-size reproduction.

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