Comparison of Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor and Sigma 28-135mm f/3.8-5.6 Aspherical IF Macro

Attribute	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor ×	Sigma 28-135mm f/3.8-5.6 Aspherical IF Macro ×
Filter Size (mm)	67	62
Notes	DX Nikkor for use with Nikon Digital SLR models only. Included Accessories: HB-32 Hood, CL-0915 Flexible Lens Pouch	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax
Closest Focus (m)	0.45	0.24
Magnification Ratio (x)	0.24	0.5
Type	Standard Zoom	Standard Zoom
Length (mm)	86.5	75
APS Equivalent	27 - 202.5mm	1.5x: 42 - 202.5mm; 1.6x: 44.8 - 216mm
Zoom System	Rotary	Rotary
Image Circle	APS-C	35mm
Focal Length (mm)	18.00 - 135.00	28.00 - 135.00
Brand	Nikon	Sigma
Name	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor	Sigma 28-135mm f/3.8-5.6 Aspherical IF Macro
Weight (g)	385	410
Aperture (f)	3.50 - 38.00	3.80 - 22.00
Diaphragm Blades	7	7
Diagonal Angle of View (degree)	12.00 - 76.00	18.20 - 75.40
Lens Construction	15 elements in 13 groups, including 1 ED and 2 aspherical elements	13 elements in 12 groups, including 1 aspherical element
Diameter (mm)	73.5	75
Focus Details	Internal; AF-S "Silent Wave" motor with full-time manual focus override feature	Internal