Comparison of Sigma 24-70mm f/3.5-5.6 Aspherical HF and Sigma 28-70mm f/2.8-4 DG

Attribute	Sigma 24-70mm f/3.5-5.6 Aspherical HF ×	Sigma 28-70mm f/2.8-4 DG ×
Aperture (f)	3.50 - 22.00	2.80 - 22.00
Filter Size (mm)	62	62
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax; Included Accessories: Lens Hood
Closest Focus (m)	0.4	0.5
Magnification Ratio (x)	0.22	0.15
Diameter (mm)	69.5	67.5
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm	1.5x: 42 - 105mm; 1.6x: 44.8 - 112mm
Diaphragm Blades	8	8
Image Circle	35mm	35mm
Focal Length (mm)	24.00 - 70.00	28.00 - 70.00
Brand	Sigma	Sigma
Name	Sigma 24-70mm f/3.5-5.6 Aspherical HF	Sigma 28-70mm f/2.8-4 DG
Weight (g)	285	255
Diagonal Angle of View (degree)	34.30 - 84.10	34.30 - 75.40
Lens Construction	9 elements in 7 groups, including 3 aspherical elements	11 elements in 8 groups, including 1 aspherical element
Zoom System	Rotary	Rotary
Length (mm)	76.4	62.5
Front Element Rotation	-	-
Focus Details	Helical Focusing	-