Comparison of Nikon 17-55mm f/2.8G ED-IF AF-S DX Nikkor and Tamron SP 24-70mm ƒ/2.8 Di VC USD (Model A007)

Attribute	Tamron SP 24-70mm ƒ/2.8 Di VC USD (Model A007) ×	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	VC image stabilization. Available mounts: Canon, Nikon, Sony. Includes petal type lens hood.	DX Nikkor for use with Nikon Digital SLR models only. Lens hood, case included.
Closest Focus (m)	0.38	0.36
Magnification Ratio (x)	0.2	0.2
Diameter (mm)	88.2	86
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 36 - 105mm; 1.6x: 38.4 - 112mm	26 - 83mm
Diaphragm Blades	9	7
Image Circle	Image Circle	APS-C
Focal Length (mm)	24.00 - 70.00	17.00 - 55.00
Brand	Tamron	Nikon
Name	Tamron SP 24-70mm ƒ/2.8 Di VC USD (Model A007)	Nikon 17-55mm f/2.8G ED-IF AF-S DX Nikkor
Weight (g)	825	764
Diagonal Angle of View (degree)	34.30 - 84.00	28.80 - 79.80
Lens Construction	17 elements in 12 groups, including 3 LD, 3 glass-molded aspherical, 1 hybrid aspherical and 2 XR (Extra Refractive Index) elements	14 elements in 10 groups, including 3 ED and 3 aspherical elements
Zoom System	Rotary	Rotary
Length (mm)	116.9	112
Diaphragm Blades Type	rounded	-
Focus Details	Internal with USD (Ultrasonic Silent Drive), continuous manual mechanism	Internal; AF-S "Silent Wave" motor