Originally announced back in February, the Tamron 17-28mm f/2.8 Di III RXD lens is a full-frame, compact, large aperture, ultra wide-angle zoom lens that Tamron is calling the smallest in its class.
Tamron 17-28mm f/2.8 Di III RXD lens
Designed specifically for Sony E-Mount mirrorless cameras, the new lens features a filter diameter of 67mm, weighs only 420 g (14.8 oz) and measures 99mm (3.9 in) in length.
The optical design is made up of 13 lenses, in 11 groups that feature 3 aspherical elements, 2 LD (Low Dispersion) and 1 XLD (eXtra Low Dispersion) lens elements to suppress chromatic aberration.
The AF drive system is powered by the RXD (Rapid eXtra-silent stepping Drive) stepping motor unit that provides high-speed, high-precision and extremely quiet operation.
The minimum object distance at the 17mm wide position is 0.19m / 7.5 in and the maximum magnification ratio is 1:5.2, while at the 28mm end, the lens can achieve a maximum magnification ratio of 1:6 with a minimum object distance of 0.26m / 10.2 in.
- f/2.8 – f/22 Aperture Range
- 13/11 Elements/Groups
- 9 Aperture Blades
- Full-Frame Format
- Water & Oil Repellant
- 67mm Filter Diameter
- Sony E Mount
The 17-28mm F/2.8 Di III RXD (Model A046) features a filter diameter of 67mm (astonishingly small for a full-frame, large aperture, ultra wide-angle zoom lens) as well as an unprecedented light weight of 420g and diminutive length of 99mm. The compact size provides excellent balance on the small profile mirrorless cameras and is easy to carry.