Canon Rebel T3i Lenses that have Sigma OS image stabilization

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

	Image stabilization	Sigma OS			Length	102 mm
	Zoom range	4x			Aperture	f/4
	Fixed aperture	No			Weight	n/a
	Max focal length	200 mm			Min focal length	50 mm

"The zoom is smooth once you get the handle of it, and its low light capability is excellent considering the price."

Fixed aperture The same aperture at all focal lengths

	Image stabilization	Sigma OS			Length	n/a
	Zoom range	2.9x			Aperture	f/2.8
	Fixed aperture	Yes			Weight	0.6 kg
	Max focal length	50 mm			Min focal length	17 mm

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

Fixed aperture The same aperture at all focal lengths

	Image stabilization	Sigma OS			Length	n/a
	Zoom range	2.9x			Aperture	f/2.8
	Fixed aperture	Yes			Weight	1.4 kg
	Max focal length	200 mm			Min focal length	70 mm

"This is a very convenient lens, good for every thing"

Great zoom range 13.9x

	Image stabilization	Sigma OS			Length	n/a
	Zoom range	13.9x			Aperture	f/3.5
	Fixed aperture	No			Weight	0.6 kg
	Max focal length	250 mm			Min focal length	18 mm

"Best for bird watchers and sports photography. Fast auto focus."

Great telephoto lens 500 mm

Great zoom range 10x

	Image stabilization	Sigma OS			Length	219 mm
	Zoom range	10x			Aperture	f/4.5
	Fixed aperture	No			Weight	2 kg
	Max focal length	500 mm			Min focal length	50 mm

"Very good picture quality (especially at f/8 and smaller) and optical stabilization. "

Great telephoto lens 400 mm

	Image stabilization	Sigma OS			Length	204 mm
	Zoom range	3.3x			Aperture	f/4.5
	Fixed aperture	No			Weight	1.7 kg
	Max focal length	400 mm			Min focal length	120 mm

"Very bright optics, fast auto focus, beautiful soft bokeh, built like a tank, and a great low light lens."

	Image stabilization	Sigma OS			Length	n/a
	Zoom range	2.8x			Aperture	f/2.8
	Fixed aperture	No			Weight	395 g
	Max focal length	50 mm			Min focal length	18 mm

"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."

	Image stabilization	Sigma OS			Length	89 mm
	Zoom range	6.9x			Aperture	f/3.8
	Fixed aperture	No			Weight	0.5 kg
	Max focal length	125 mm			Min focal length	18 mm