Comparison of Canon EF-S 18-135mm f/3.5-5.6 IS USM and Sigma 18-125mm f/3.8-5.6 DC OS HSM

Attribute	Canon EF-S 18-135mm f/3.5-5.6 IS USM ×	Sigma 18-125mm f/3.8-5.6 DC OS HSM ×
Notes	Compatible with PZ-E Power Zoom Adapter; Image Stabilization up to 4-stops; EW-73D lens hood included.	Image Stabilization; Available AF mounts: Sigma, Canon, Nikon, Pentax, Sony
Magnification Ratio (x)	0.21	0.26
Filter Size (mm)	67	67
Length (mm)	96	88.5
Closest Focus (m)	0.39	0.35
Diagonal Angle of View (degree)	11.30 - 74.20	11.40 - 69.30
Focus Details	Inner focusing; Nano USM AF with full-time manual focus	Internal, with HSM
Focal Length (mm)	18.00 - 135.00	18.00 - 125.00
APS Equivalent	29 - 216mm	1.5x: 27 - 188mm; 1.6x: 29 - 200mm
Brand	Canon	Sigma
Image Circle	APS-C	Image Circle
Name	Canon EF-S 18-135mm f/3.5-5.6 IS USM	Sigma 18-125mm f/3.8-5.6 DC OS HSM
Weight (g)	515	505
Type	Standard Zoom	Standard Zoom
Aperture (f)	3.50 - 36.00	3.80 - 22.00
Diaphragm Blades	7	7
Diaphragm Blades Type	rounded	-
Lens Construction	16 elements in 12 groups	16 elements in 12 groups, including SLD and aspherical elements
Zoom System	Rotary	Rotary
Diameter (mm)	77.4	74