Nikon D3100 Lenses made by Tokina that have a f/2.8 or faster aperture

"The pictures are crisp, and the fast shutter speed is great for indoor shooting."

	Aperture	f/2.8			Max focal length	16 mm
	Min focal length	11 mm			Weight	0.6 kg
	Length	89 mm			Diameter	n/a
	Zoom range	1.5x			Auto focus	Yes

"I really love the mechanical quality of the Tokina lenses and I purchased this as a high qulity, higher speed general purpose lens to complement my 18-200mm Nikkor and 12-24mm Tokina lenses."

	Aperture	f/2.8			Max focal length	50 mm
	Min focal length	16 mm			Weight	0.6 kg
	Length	97 mm			Diameter	84 mm
	Zoom range	3.1x			Auto focus	Yes

"Very impressed with this lens [...].This lens is all about build & image quality & it is also very easy to use & to switch to manual focus."

	Aperture	f/2.8			Max focal length	100 mm
	Min focal length	100 mm			Weight	0.5 kg
	Length	n/a			Diameter	n/a
	Zoom range	1x			Auto focus	Yes

"Super sharp, love the pull-in, pull-out MF/AF. Heavy built, excellent for portrait lens or macro!"

	Aperture	f/2.8			Max focal length	35 mm
	Min focal length	35 mm			Weight	340 g
	Length	60 mm			Diameter	73 mm
	Zoom range	1x			Auto focus	Yes