Comparison of Nikon 10-24mm ƒ/3.5-4.5G ED AF-S DX Nikkor and Sigma 10-20mm f/4-5.6 EX DC HSM

Attribute	Nikon 10-24mm ƒ/3.5-4.5G ED AF-S DX Nikkor ×	Sigma 10-20mm f/4-5.6 EX DC HSM ×
Notes	Included Accessories: Soft Case, Lens Hood	Available AF mounts: Sigma, Canon, Nikon, Four-Thirds, Pentax, Sony
Magnification Ratio (x)	0.2	0.15
Filter Size (mm)	77	77
Length (mm)	87	81
Closest Focus (m)	0.24	0.24
Diagonal Angle of View (degree)	61.00 - 109.00	63.80 - 102.40
Focus Details	Internal with built-in SWM and M/A focus switch	Internal with HSM
Focal Length (mm)	10.00 - 24.00	10.00 - 20.00
APS Equivalent	15 - 36mm	1.5x: 15 - 30mm; 1.6x: 16 - 32mm; 2.0x: 20 - 40mm
Brand	Nikon	Sigma
Image Circle	Image Circle	Image Circle
Name	Nikon 10-24mm ƒ/3.5-4.5G ED AF-S DX Nikkor	Sigma 10-20mm f/4-5.6 EX DC HSM
Weight (g)	460	470
Type	Wide Zoom	Wide Zoom
Aperture (f)	3.50 - 29.00	4.00 - 22.00
Diaphragm Blades	7	6
Diaphragm Blades Type	rounded	-
Lens Construction	14 elements in 9 groups, including 3 aspherical and 2 ED elements	14 elements in 10 groups, including three aspherical elements and three Special Low Dispersion (SLD) lenses
Zoom System	Rotary	Rotary
Diameter (mm)	82.5	83.5