Canon Rebel T3i Lenses that have Sigma OS image stabilization and have a Sigma HSM focus motor

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

Fixed aperture The same aperture at all focal lengths

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

"Love the wide range of focal length from 50 to 500mm. I find the quality of the photos at all focal lengths to be very crisp and in focus."

Great telephoto lens 500 mm

Great zoom range 10x

	Image stabilization	Sigma OS			Max focal length	500 mm
	Focus motor	Sigma HSM			Length	219 mm
	Zoom range	10x			Weight	2 kg
	Fixed aperture	No			Aperture	f/4.5

"Consistent output, fast/accurate auto-focus, nice bokeh, strong construction."

Fixed aperture The same aperture at all focal lengths

	Image stabilization	Sigma OS			Max focal length	200 mm
	Focus motor	Sigma HSM			Length	n/a
	Zoom range	2.9x			Weight	1.4 kg
	Fixed aperture	Yes			Aperture	f/2.8

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

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

"I love this lens, bought it primarily for wildlife. Tack sharp images of antelope while braced against nothing but the frame of my car window (with the car engine running!) at ISO 100 with Optical Stabilization turned on. "

Great telephoto lens 400 mm

	Image stabilization	Sigma OS			Max focal length	400 mm
	Focus motor	Sigma HSM			Length	204 mm
	Zoom range	3.3x			Weight	1.7 kg
	Fixed aperture	No			Aperture	f/4.5

"For beginers and entusiasts it's a great choice."

Quite short 102 mm

	Image stabilization	Sigma OS			Max focal length	200 mm
	Focus motor	Sigma HSM			Length	102 mm
	Zoom range	4x			Weight	n/a
	Fixed aperture	No			Aperture	f/4

"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."

Quite short 89 mm

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