The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E is a full frame wide angle zoom lens specially designed for Sony E mount. The lens has an aperture range of F2.8 to F22 and an RXD stepper motor that focuses both fast and nearly silent. In addition, the lens consists of 13 elements in 11 groups with 9 rounded blades for a very soft bokeh. The lens also has Low Dispersion and Extra Low Dispersion elements and BBAR coating to counter chromatic aberrations, ghosting and flares. The minimum focus distance is 19cm. The angle of view is 103° to 75°. Its dimensions are 73 x 99 mm. The lens is also dust and splashproof, weighs 0.42 kg and has a filter size of 67 mm.