Comparison of Nikon 12-24mm f/4G ED-IF AF-S DX Nikkor and Sigma 10-20mm ƒ/3.5 EX DC HSM

Attribute	Sigma 10-20mm ƒ/3.5 EX DC HSM ×	Nikon 12-24mm f/4G ED-IF AF-S DX Nikkor ×
Filter Size (mm)	82	77
Notes	Available AF mounts: Sigma, Canon, Nikon, Sony, Pentax; Included Accessories: Soft Case, Petal-type Hood	DX Nikkor for use with Nikon Digital SLR models only. Lens hood, case included.
Closest Focus (m)	0.24	0.3
Magnification Ratio (x)	0.15	0.12
Type	Wide Zoom	Wide Zoom
Length (mm)	88.2	90
APS Equivalent	1.5x: 15 - 30mm; 1.6x: 16 - 32mm	18 - 36mm
Zoom System	Rotary	Rotary
Image Circle	Image Circle	APS-C
Focal Length (mm)	10.00 - 20.00	12.00 - 24.00
Brand	Sigma	Nikon
Name	Sigma 10-20mm ƒ/3.5 EX DC HSM	Nikon 12-24mm f/4G ED-IF AF-S DX Nikkor
Weight (g)	520	485
Aperture (f)	3.50 - 22.00	4.00 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	63.80 - 102.40	61.00 - 99.00
Lens Construction	13 elements in 10 groups, including 4 aspherical, 1 SLD and 2 ELD elements	11 elements in 7 groups, including 2 ED elements and 3 aspherical elements
Diameter (mm)	87.3	81
Focus Details	Internal with HSM	Internal; AF-S "Silent Wave" motor