Comparison of Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM and Sony 28-75mm f/2.8 SAM SAL-2875

Attribute	Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM ×	Sony 28-75mm f/2.8 SAM SAL-2875 ×
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Filter Size (mm)	72	67
Notes	Image Stabilized. Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony	Zoom Lock Switch. Included Accessories: ALC-SH109 Petal Lens Hood
Closest Focus (m)	0.22	0.38
Magnification Ratio (x)	0.37	0.22
Zoom System	Rotary with lock	Rotary
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 25.5 - 105mm; 1.6x: 27.2 - 112mm	42 - 112.5mm
Diaphragm Blades	7	7
Image Circle	APS-C	35mm
Focal Length (mm)	17.00 - 70.00	28.00 - 75.00
Brand	Sigma	Sony
Name	Sigma 17-70mm ƒ/2.8-4 DC Macro OS HSM	Sony 28-75mm f/2.8 SAM SAL-2875
Weight (g)	535	565
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 13 groups, including 1 ELD and 3 aspherical elements	16 elements in 14 groups, including 4 aspheric and 3 ED elements
Diagonal Angle of View (degree)	20.20 - 72.40	34.00 - 75.00
Length (mm)	88.9	94
Diameter (mm)	79	77.5
Focus Details	Internal, with Hyper-Sonic Motor; AF/MF switch	Smooth Autofocus Motor (SAM) with AF/MF switch