Comparison of Sigma 28-105mm f/2.8-4 Aspherical IF and Sigma 28-105mm f/2.8-4 DG

Attribute	Sigma 28-105mm f/2.8-4 DG ×	Sigma 28-105mm f/2.8-4 Aspherical IF ×
Filter Size (mm)	72	62
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax
Closest Focus (m)	0.5	0.5
Magnification Ratio (x)	0.18	0.18
Type	Standard Zoom	Standard Zoom
Length (mm)	81	79.5
APS Equivalent	1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm	1.5x: 42 - 157.5mm; 1.6x: 44.8 - 168mm
Zoom System	Rotary	Rotary
Image Circle	35mm	35mm
Focal Length (mm)	28.00 - 105.00	28.00 - 105.00
Brand	Sigma	Sigma
Name	Sigma 28-105mm f/2.8-4 DG	Sigma 28-105mm f/2.8-4 Aspherical IF
Weight (g)	405	405
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	8	8
Diagonal Angle of View (degree)	23.30 - 75.40	23.30 - 75.40
Lens Construction	12 elements in 11 groups, including 1 aspherical element	12 elements in 11 groups, including 1 aspherical element
Diameter (mm)	77	77
Focus Details	Internal focusing	Internal