Comparison of Konica Minolta AF 17-35mm f/3.5 G and Sigma 20-40mm f/2.8 EX DG Aspherical

Attribute	Sigma 20-40mm f/2.8 EX DG Aspherical ×	Konica Minolta AF 17-35mm f/3.5 G ×
Diagonal Angle of View (degree)	56.80 - 94.50	63.00 - 104.00
Zoom System	Rotary	Rotary
Filter Size (mm)	82	77
Aperture (f)	2.80 - 22.00	3.50 - 22.00
Type	Wide Zoom	Wide Zoom
Magnification Ratio (x)	0.22	0.17
APS Equivalent	1.5x: 30 - 60mm; 1.6x: 32 - 64mm	25.5 - 52.5mm
Diaphragm Blades	8	-
Image Circle	35mm	35mm
Focal Length (mm)	20.00 - 40.00	17.00 - 35.00
Brand	Sigma	Konica-minolta
Name	Sigma 20-40mm f/2.8 EX DG Aspherical	Konica Minolta AF 17-35mm f/3.5 G
Weight (g)	595	600
Diameter (mm)	89	82.5
Lens Construction	17 elements in 13 groups, including 2 aspherical elements	15 elements in 12 groups
Focus Details	Internal with Dual Focus mechanism	-
Length (mm)	107.8	90.5
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax	-
Closest Focus (m)	0.27	0.3