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Black cylindrical zoom lens with silver focal length markings and a textured focus ring

Tamron

Tamron 17-70mm f/2.8 Di III-A VC RXD camera lens

SKU CH-8CKA-R63ND

A versatile 17-70mm f/2.8 zoom for Sony E APS-C mirrorless cameras with 4.1x range, VC stabilisation, close focus down to 7.5 inches and moisture-resistant construction

  • TypeZoom Lens
  • ColorBlack
  • Focus TypeAuto Focus
  • Constant f/2.8 aperture across 17-70mm zoom range
  • World-first 4.1x high-speed zoom for APS-C mirrorless cameras
  • Upgraded vibration compensation with AI-assisted video stabilisation
  • Close focus from 7.5 inches at 17mm wide end
  • Moisture-resistant build with fluorine coating on front element

Everyday zoom for APS-C mirrorless

The Tamron 17-70mm f/2.8 Di III-A VC RXD is a high-speed standard zoom built for Sony E-mount APS-C cameras. It covers a 17-70mm focal range with a constant f/2.8 aperture across the 4.1x zoom ratio. The optical design uses 16 elements in 12 groups including two GM aspherical and one hybrid aspherical element. A 67mm filter thread matches other Tamron lenses for full-frame mirrorless systems.

Sustained shooting with AI-assisted stabilization

Vibration Compensation works with Sony APS-C bodies and uses AI to improve stabilization during video recording compared to earlier designs. The constant f/2.8 aperture maintains exposure consistency throughout the zoom range when shooting extended sequences. Moisture-resistant construction and fluorine coating on the front element protect the lens during prolonged outdoor use. Close focusing reaches 7.5 inches at 17mm and 15.4 inches at 70mm for detailed near-subject work.

Upgrade from variable-aperture kit zooms

This lens replaces slower variable-aperture zooms that lose light at longer focal lengths. The jump is worth it when you need constant f/2.8 brightness across a versatile 25.5-105mm equivalent range for low-light and depth-of-field control. It is not for photographers who require full-frame coverage or focal lengths beyond 105mm equivalent. Builders needing a second telephoto lens for wildlife or sports should look elsewhere.

Highlights

  • Constant f/2.8 aperture across 17-70mm zoom range
  • World-first 4.1x high-speed zoom for APS-C mirrorless cameras
  • Upgraded vibration compensation with AI-assisted video stabilisation
  • Close focus from 7.5 inches at 17mm wide end
  • Moisture-resistant build with fluorine coating on front element

Specifications

TypeZoom Lens
ColorBlack
Focus TypeAuto Focus
BrandTAMRON
ModelNot Available

Questions about this item

How quiet and cool does the 17-70mm f/2.8 run during long video sessions with VC active?

The RXD stepping motor drives autofocus silently and the VC mechanism uses AI-assisted stabilization for smooth handheld video without audible motor noise.

Which camera bodies and accessories are required to use this 17-70mm f/2.8 lens?

It mounts natively on Sony E-mount APS-C mirrorless bodies and accepts 67 mm filters; no adapter or external power source is needed.

Will the 17-70mm f/2.8 work properly on an older Sony APS-C body without the latest AI firmware?

Yes, it remains fully compatible with Fast Hybrid AF and Eye AF on earlier Sony APS-C models, while VC still compensates shake at the 25.5–105 mm equivalent range.

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