Comparison of Sigma 18-50mm f/3.5-5.6 DC and Sigma 24-70mm f/3.5-5.6 Aspherical HF

Attribute	Sigma 24-70mm f/3.5-5.6 Aspherical HF ×	Sigma 18-50mm f/3.5-5.6 DC ×
Filter Size (mm)	62	58
Closest Focus (m)	0.4	0.25
Magnification Ratio (x)	0.22	0.29
Length (mm)	76.4	67.5
Front Element Rotation	-	-
Diagonal Angle of View (degree)	34.30 - 84.10	27.90 - 69.30
Focus Details	Helical Focusing	Internal; HSM version available for Nikon mount
Focal Length (mm)	24.00 - 70.00	18.00 - 50.00
APS Equivalent	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm
Brand	Sigma	Sigma
Image Circle	35mm	Image Circle
Name	Sigma 24-70mm f/3.5-5.6 Aspherical HF	Sigma 18-50mm f/3.5-5.6 DC
Weight (g)	285	250
Type	Standard Zoom	Standard Zoom
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	Available AF Mounts: Canon, Nikon, Minolta/Sony, Pentax, Four-Thirds, Sigma; HSM version available for Nikon mount
Diaphragm Blades	8	7
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Lens Construction	9 elements in 7 groups, including 3 aspherical elements	8 elements in 8 groups
Zoom System	Rotary	Rotary
Diameter (mm)	69.5	62