Comparison of Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM and Sony FE 16-35mm f/4 ZA OSS Zeiss Vario-Tessar T* SEL1635Z

Attribute	Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM ×	Sony FE 16-35mm f/4 ZA OSS Zeiss Vario-Tessar T* SEL1635Z ×
Aperture (f)	2.80 - 22.00	4.00 - 22.00
Filter Size (mm)	77	72
Notes	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Minolta, Pentax	Sony E-mount; Image Stabilized; Dust and moisture resistant; Included Accessories: Lens hood, carrying case
Closest Focus (m)	0.27	0.28
Magnification Ratio (x)	0.22	0.19
Diameter (mm)	83.5	78
Type	Wide Zoom	Wide Zoom
APS Equivalent	1.5x: 25.5 - 52.5mm; 1.6x: 27.2 - 56mm	24 - 52.5mm
Diaphragm Blades	8	7
Image Circle	35mm	35mm (Full-frame E-Mount)
Focal Length (mm)	17.00 - 35.00	16.00 - 35.00
Brand	Sigma	Sony
Name	Sigma 17-35mm f/2.8-4 EX DG Aspherical HSM	Sony FE 16-35mm f/4 ZA OSS Zeiss Vario-Tessar T* SEL1635Z
Weight (g)	560	518
Diagonal Angle of View (degree)	63.40 - 103.70	63.00 - 107.00
Lens Construction	16 elements in 13 groups, including 2 aspherical and 1 SLD elements	12 elements in 10 groups, including 3 ED and 5 aspherical elements
Zoom System	Rotary	Rotary
Length (mm)	88.7	98.5
Diaphragm Blades Type	-	circular
Focus Details	Internal Focus; HSM with full-time manual override	Internal; SSM (Super Sonic wave Motor) with Focus Hold button and Auto Clutch