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Black compact zoom lens with silver focal length markings and a wide front element

Tamron

Tamron 11-20mm f/2.8 Di III-A RXD B070 camera lens

SKU CH-96FS-K8652 MPN B070

Ultra-wide zoom for Sony E-mount APS-C mirrorless cameras with constant f/2.8 aperture and 0.15 m close focus

  • TypeZoom Lens
  • ColorBlack
  • CompatibilityMirrorless Camera
  • Constant f/2.8 aperture across 11-20mm zoom for bright ultra-wide shots
  • Minimum focus 0.15 m at 11 mm enables close-up wide-angle macro
  • RXD stepping motor delivers fast silent autofocus for stills and video
  • Moisture-resistant construction with fluorine coating protects front element in harsh conditions
  • Compact lightweight design makes this ultra-wide zoom ideal for daily carry

Ultra-Wide APS-C Zoom

The Tamron 11-20mm f/2.8 Di III-A RXD B070 is a constant-aperture ultra wide-angle zoom lens built for Sony E-mount APS-C mirrorless cameras. It covers a 11-20mm focal range with a fixed f/2.8 maximum aperture throughout. The lens uses an RXD stepping motor for quiet, responsive autofocus and includes moisture-resistant construction plus a fluorine coating on the front element.

Landscape, architecture and low-light shooters

Photographers who need a bright, portable ultra-wide for interiors, cityscapes or astrophotography will benefit from the constant f/2.8 aperture and close-focusing ability. The 0.15m minimum object distance at 11mm and 0.24m at 20mm also suit creative wide-angle macro work. Shooters requiring longer reach, full-frame coverage or image stabilisation should consider other lenses.

Constant f/2.8 aperture across 11-20mm

The defining specification is the fixed f/2.8 maximum aperture maintained through the entire zoom range. This allows consistent exposure and depth-of-field control from the widest 11mm setting to the 20mm long end, which is unusual for an APS-C ultra-wide zoom and directly determines low-light capability and subject separation.

Highlights

  • Constant f/2.8 aperture across 11-20mm zoom for bright ultra-wide shots
  • Minimum focus 0.15 m at 11 mm enables close-up wide-angle macro
  • RXD stepping motor delivers fast silent autofocus for stills and video
  • Moisture-resistant construction with fluorine coating protects front element in harsh conditions
  • Compact lightweight design makes this ultra-wide zoom ideal for daily carry

Specifications

BrandTAMRON
TypeZoom Lens
ColorBlack
CompatibilityMirrorless Camera

Questions about this item

What filter thread size does the Tamron B070 lens require?

The Tamron B070 lens uses a 60 mm filter thread for circular screw-in filters.

How do I mount this lens on my Sony E-mount APS-C camera, and what step is often missed?

Align the white mount index on the lens barrel with the matching dot on the camera bayonet, then twist clockwise until it clicks; the step people forget is removing both the rear lens cap and the camera body cap before mounting.

What regular care does the fluorine coating on the front element need?

Wipe the front glass with a clean microfibre cloth; for stubborn marks use a drop of lens cleaning fluid on the cloth, never directly on the coating, and avoid abrasive tissues that could wear the fluorine layer.

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