Lens SAL-1635Z Sony Carl Zeiss Vario-Sonnar T* 16-35mm F2.8 ZA SSM
Box contents Front and rear caps, users manual, hood and soft case.
Build quality Very good
Specifications below

Optical configuration 17 elements in 13 groups
Angle of view 107°-63° full frame, 83°-44° APS-C.
Aperture 9 blades, curved
Full frame and APS-C Yes, full frame and APS-C. APS-C equivalent, 24-52.5mm
Depth of field and focus scales? Focus distance window, and focal length index marks at 16mm, 20mm, 24mm, 28mm, and 35mm.
Minimum focus, image plane to subject 11" (279mm)
Minimum focus, end of lens barrel to subject 4.35" (110mm)
Hard stop at infinity focus? No
Length changes when focusing? No
Focus ring turns in AF? No
Filter size 77mm
Filter ring rotates? No
Distance encoder? Yes
Max magnification 0.24x, or 1:4.2
Min. F/stop F/22
Sony teleconverter compatible? No
Length changes when zooming? No
Dimensions WxL (my measurements) 3.27" x 4.5" 83mm x 114mm. Add 2mm in width for AF/MF switch.
Maximum extended length (my measurements) 4.5" (114mm)
Weight bare (my scale) 30.4oz (863g) 31.7oz (899g) with caps