Lenses for less than $400 that have a Sigma HSM focus motor

"Very happy with this lens. Used this lens for a wedding this past weeked, very pleased." bhphotovideo.com

More advanced image stabilization Sigma OS

	Focus motor	Sigma HSM			Max focal length	70 mm
	Zoom range	4.1x			Fixed aperture	No
	Image stabilization	Sigma OS			Diameter	79 mm
	Aperture	f/2.8			Length	82 mm

"I like the lense. It is a great walk around lense which is light and fast enough for situations where other lenses fail. I used to have the 17-85mm EF-S Canon lense before and was looking for a faster alternative that is having a good wide ancle" bhphotovideo.com

More advanced image stabilization Sigma OS

	Focus motor	Sigma HSM			Max focal length	70 mm
	Zoom range	4.1x			Fixed aperture	No
	Image stabilization	Sigma OS			Diameter	79 mm
	Aperture	f/2.8			Length	82 mm

"It is extremely sharp and is definatly wide enough. This is a true wide angle lens." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Focus motor	Sigma HSM			Max focal length	20 mm
	Zoom range	2x			Fixed aperture	Yes
	Image stabilization	None			Diameter	86 mm
	Aperture	f/3.5			Length	89 mm

"When you really need to get it all in view, this is a great lens. Well made lens for the money. No chromatic aborations! Sharp if you use f11-16. Construction is excellent. Nothing negative to say about this lens." bhphotovideo.com

	Focus motor	Sigma HSM			Max focal length	20 mm
	Zoom range	2x			Fixed aperture	No
	Image stabilization	None			Diameter	86 mm
	Aperture	f/4			Length	89 mm