Nikon D5100 Lenses made by Sigma

"The HSM is quite and fast as well as accurate."

Great zoom range 11.1x

More advanced image stabilization Sigma OS

	Aperture	f/3.5			Image stabilization	Sigma OS
	Fixed aperture	No			Length	100 mm
	Zoom range	11.1x			Min focal length	18 mm
	Max focal length	200 mm			Weight	0.6 kg

"Amazing Lens for the price. Images are crisp, clear, and gorgeous. Fantastic!"

More advanced image stabilization Sigma OS

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

"Very happy with this lens. Used this lens for a wedding this past weeked, very pleased."

More advanced image stabilization Sigma OS

	Aperture	f/2.8			Image stabilization	Sigma OS
	Fixed aperture	No			Length	83 mm
	Zoom range	4.1x			Min focal length	17 mm
	Max focal length	70 mm			Weight	0.5 kg

"This is an impressive lens with no obvious cons. The build quality is excellent and image quality and resolution at a variety of distances and macro are at least as good (to my eyes) as Nikon glass. The bokeh is also good especially for a zoom lens."

	Aperture	f/2.8			Image stabilization	None
	Fixed aperture	n/a			Length	137 mm
	Zoom range	1x			Min focal length	150 mm
	Max focal length	150 mm			Weight	0.9 kg

"I use it a lot for wildlife photography and this allows me to capture features of wild animals from a safe distance without losing quality. I'm very impressed with the Bokeh it produces."

Great telephoto lens 500 mm

More advanced image stabilization Sigma OS

	Aperture	f/5			Image stabilization	Sigma OS
	Fixed aperture	No			Length	252 mm
	Zoom range	3.3x			Min focal length	150 mm
	Max focal length	500 mm			Weight	1.9 kg

"The OS works excellent. Clear at even 200mm and nice bokeh."

Fixed aperture The same aperture at all focal lengths

More advanced image stabilization Sigma OS

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

"It produces very sharp images with great contrast. The focusing motor is quiet. It is well made, has a matt black finish and comes with a lens hood and nice case"

Wide aperture f/1.4

	Aperture	f/1.4			Image stabilization	None
	Fixed aperture	n/a			Length	59 mm
	Zoom range	1x			Min focal length	30 mm
	Max focal length	30 mm			Weight	430 g

"It is terrific! Colors are warm and pure, autofocus is fast and razor sharp, and backgrounds melt into smooth blurred colors."

Wide aperture f/1.4

	Aperture	f/1.4			Image stabilization	None
	Fixed aperture	n/a			Length	68 mm
	Zoom range	1x			Min focal length	50 mm
	Max focal length	50 mm			Weight	0.5 kg