Canon Rebel T3i Wide angle lenses that have a Sigma HSM focus motor

"Great for certain things such as landscape, real-estate, and architecture."

	Focus motor	Sigma HSM			Aperture	f/4.5
	Zoom range	2x			Max focal length	16 mm
	Image stabilization	None			Weight	0.6 kg
	Fixed aperture	No			Length	n/a

"Great lens which work very well within the Sea & Sea Standard Flat Port with no vignetting."

	Focus motor	Sigma HSM			Aperture	f/4
	Zoom range	2x			Max focal length	20 mm
	Image stabilization	None			Weight	n/a
	Fixed aperture	No			Length	81 mm

"It's SUPER quiet and love that it comes with a hood and has a metal mount. Very durable and nice lens."

	Focus motor	Sigma HSM			Aperture	f/2.8
	Zoom range	2.8x			Max focal length	50 mm
	Image stabilization	Sigma OS			Weight	395 g
	Fixed aperture	No			Length	n/a

"I got this lens about a month and a half ago and I have been pleased with it so far. It is my second walk-around lens for my Canon XTi."

	Focus motor	Sigma HSM			Aperture	f/3.8
	Zoom range	6.9x			Max focal length	125 mm
	Image stabilization	Sigma OS			Weight	0.5 kg
	Fixed aperture	No			Length	89 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"

	Focus motor	Sigma HSM			Aperture	f/2.8
	Zoom range	4.1x			Max focal length	70 mm
	Image stabilization	Sigma OS			Weight	465 g
	Fixed aperture	No			Length	n/a

"One of the main pros of these lens is the AF system – fast and acurate."

Fixed aperture The same aperture at all focal lengths

	Focus motor	Sigma HSM			Aperture	f/2.8
	Zoom range	2.9x			Max focal length	50 mm
	Image stabilization	Sigma OS			Weight	0.6 kg
	Fixed aperture	Yes			Length	n/a

"The lens is great, especially If you like taking interior shots or panoramic, architectural buildings, architectural models."

Fixed aperture The same aperture at all focal lengths

	Focus motor	Sigma HSM			Aperture	f/3.5
	Zoom range	2x			Max focal length	20 mm
	Image stabilization	None			Weight	0.5 kg
	Fixed aperture	Yes			Length	n/a