Comparison of Nikon 17-55mm f/2.8G ED-IF AF-S DX Nikkor and Sigma 24-70mm f/2.8 DG DN Art

Attribute	Sigma 24-70mm f/2.8 DG DN Art ×	Nikon 17-55mm f/2.8G ED-IF AF-S DX Nikkor ×
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Filter Size (mm)	82	77
Notes	Available AF Mounts: L-Mount, E-Mount; Mount with dust- and splash-proof design	DX Nikkor for use with Nikon Digital SLR models only. Lens hood, case included.
Closest Focus (m)	0.18	0.36
Magnification Ratio (x)	0.34	0.2
Diameter (mm)	87.8	86
Type	Standard Zoom	Standard Zoom
APS Equivalent	36 - 105mm	26 - 83mm
Diaphragm Blades	11	7
Image Circle	35mm	APS-C
Focal Length (mm)	24.00 - 70.00	17.00 - 55.00
Brand	Sigma	Nikon
Name	Sigma 24-70mm f/2.8 DG DN Art	Nikon 17-55mm f/2.8G ED-IF AF-S DX Nikkor
Weight (g)	835	764
Diagonal Angle of View (degree)	34.30 - 84.10	28.80 - 79.80
Lens Construction	19 elements in 15 groups, including 6 FLD, 2 SLD and 3 aspherical elements; Super Multi-Layer Coating, Nano Porous Coating.	14 elements in 10 groups, including 3 ED and 3 aspherical elements
Zoom System	Rotary (with zoom lock)	Rotary
Length (mm)	122.9	112
Diaphragm Blades Type	rounded	-
Focus Details	Internal focus with stepping motor; AF/MF switch; AFL button	Internal; AF-S "Silent Wave" motor