Canon EF 17–40mm lens vs Sigma 18-125mm f/3.8-5.6 DC OS HSM

Both are Canon EF lenses. Here is what actually differs.

Canon · 2003

EF 17–40mm lens

f/4500 g

Full specs

Sigma

18-125mm f/3.8-5.6 DC OS HSM

f/3.8HSM

Check price Full specs

Pick the Canon EF 17–40mm lens if

You want a wider view: 17mm vs 18mm at the wide end
You shoot close-ups: it focuses down to 0.28 m vs 0.35 m

Pick the Sigma 18-125mm f/3.8-5.6 DC OS HSM if

You need more reach: 125mm vs 40mm at the long end
You shoot handheld in dim light or video: it has optical image stabilization and the Canon EF 17–40mm lens does not

Spec differences

16 differences

Specifications that differ between the Canon EF 17–40mm lens and the Sigma 18-125mm f/3.8-5.6 DC OS HSM
	Canon EF 17–40mm lens	Sigma 18-125mm f/3.8-5.6 DC OS HSM
Brand	Canon	Sigma
Type	Zoom	Superzoom
Format	not listed	APS-C
Focal length	17-40mm	18-125mm
Max aperture	f/4	f/3.8
Weight	500 g	not listed
Length	96.8 mm	not listed
Diameter	83.5 mm	not listed
Filter thread	77 mm	67 mm
Min focus distance	0.28 m closer	0.35 m
Max magnification	not listed	0.26×
Aperture blades	not listed	7
Optical design	not listed	16 elements / 12 groups
Autofocus motor	not listed	HSM
Image stabilization	No	Yes stabilized
Released	2003	not listed

1 identical spec hidden: mount. Show all

Mount: Canon EF both

Our notes

Canon EF 17–40mm lens

The Canon EF 17–40mm lens is a wide-angle zoom lens covering 17-40mm at f/4 for Canon EF mount cameras. It covers wide angles for landscapes, interiors and architecture.

Our notes