Comparison of Sigma 28-70mm f/2.8 DG DN Contemporary and Sony SAL-1680Z Carl Zeiss Vario-Sonnar T* DT 16-80mm f/3.5-4.5

Attribute	Sigma 28-70mm f/2.8 DG DN Contemporary ×	Sony SAL-1680Z Carl Zeiss Vario-Sonnar T* DT 16-80mm f/3.5-4.5 ×
Notes	Available AF Mounts: L-Mount, E-Mount; Dust- and splash-proof at lens mount	Included Accessories: SH005 Lens Hood
Magnification Ratio (x)	4.6	0.24
Filter Size (mm)	67	62
Length (mm)	101.5	83
Closest Focus (m)	0.19	0.37
Diagonal Angle of View (degree)	34.30 - 75.40	20.00 - 83.00
Focus Details	Internal focus with stepping motor; AF/MF switch; Supports DMF, AF+MF on Sony cameras	Internal; Auto Clutch
Focal Length (mm)	28.00 - 70.00	16.00 - 80.00
APS Equivalent	42 - 105mm	24 - 120mm
Brand	Sigma	Sony
Image Circle	35mm	APS-C
Name	Sigma 28-70mm f/2.8 DG DN Contemporary	Sony SAL-1680Z Carl Zeiss Vario-Sonnar T* DT 16-80mm f/3.5-4.5
Weight (g)	470	440
Type	Standard Zoom	Standard Zoom
Aperture (f)	2.80 - 22.00	3.50 - 29.00
Diaphragm Blades	9	7
Diaphragm Blades Type	rounded	-
Lens Construction	16 elements in 12 groups, including 2 FLD, 2 SLD and 3 aspherical elements; Super Multi-Layer Coating, Nano Porous Coating.	14 elements in 10 groups, including 2 aspherical elements
Zoom System	Rotary	Rotary
Diameter (mm)	72.2	72