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

"The OS works incredibly well and perhaps I got a great copy, but it is sharp wide open."

Fixed aperture The same aperture at all focal lengths

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

"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			Aperture	f/4.5
	Fixed aperture	No			Length	219 mm
	Zoom range	10x			Weight	2 kg

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

Great telephoto lens 400 mm

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

"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			Aperture	f/4
	Fixed aperture	No			Length	102 mm
	Zoom range	4x			Weight	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."

Quite short 89 mm

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