Tamron 17-70mm F2.8 Di III-A VC RXD

Compact, lightweight design is perfect match for APS-C mirrorless cameras
This lens was created through the uncompromising pursuit of portability optimized for use with APS-C Sony E-mount cameras. Even with the inclusion of high-performance VC, the 17-70mm F2.8 is extremely light weight and compact, with an overall length of just 119.3mm (4.7 in), maximum diameter of 74.6mm, and weight of 525g (18.5 oz). It is a very versatile lens for travel, where small bags are preferred, and is a great portable lens for daily use.

Specifications

Focal Length: 17-70mm
Maximum Aperature: F2.8
Angle of View (diagonal): 79 55'-23 00' (for APS-C frame mirrorless format)
Optical Construction: 16 elements in 12 groups
Minimum Object Distance: 0.19m (WIDE) / 0.39m (TELE)
Maximum Magnification Ratio: 1:4.8 (WIDE) / 1:5.2 (TELE)
Filter Size: f67mm
Maximum Diameter: f74.6mm
Length : 119.3mm
Weight: 525g
Aperature Blades: 9 (circular diaphragm)
Minimum Aperture: F22
Standard Accessory: Flower-shaped hood, Lens caps
Compatible Mounts: Sony E-mount, FujiFilm X-mount

Length is the distance from the front tip of the lens to the lens mount face.
The circular diaphragm stays almost perfectly circular up to two stops down from maximum aperture.