Canon Rebel T3i Zoom Portrait lenses that have Sigma OS image stabilization

"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			Focus motor	Sigma HSM
	Fixed aperture	Yes			Aperture	f/2.8
	Weight	1.4 kg			Zoom range	2.9x
	Max focal length	200 mm			Min focal length	70 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			Focus motor	Sigma HSM
	Fixed aperture	Yes			Aperture	f/2.8
	Weight	0.6 kg			Zoom range	2.9x
	Max focal length	50 mm			Min focal length	17 mm

"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			Focus motor	Sigma HSM
	Fixed aperture	No			Aperture	f/2.8
	Weight	395 g			Zoom range	2.8x
	Max focal length	50 mm			Min focal length	18 mm

"It takes clear images at low shutter speeds thanks to it's image stabilization. It feels solid and is not very heavy."

Great telephoto lens 300 mm

	Image stabilization	Sigma OS			Focus motor	None
	Fixed aperture	No			Aperture	f/4
	Weight	0.6 kg			Zoom range	4.3x
	Max focal length	300 mm			Min focal length	70 mm

"I was looking for a lens with a better focal lenght range than the kit 18-55 lens. I found this one to be perfect, because of the focal lenght, the OS, the HSM and the reasonable price for the features."

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

	Image stabilization	Sigma OS			Focus motor	Sigma HSM
	Fixed aperture	No			Aperture	f/2.8
	Weight	465 g			Zoom range	4.1x
	Max focal length	70 mm			Min focal length	17 mm

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

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