Nikon D3100 Lenses that have a focus motor and have a f/2.8 or faster aperture

"This lens is really great. The picture quality is awsome. It can make great proxy. I've shot a picture of a spider and i can see the hair over his eyes."

More advanced image stabilization Sigma OS

	Aperture	f/2.8			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Zoom range	4.1x
	Fisheye	No			Length	83 mm
	Fixed aperture	No			Weight	0.5 kg

"I love how light weight and compact this lens is. Its sharpness at 1.4 is amazing."

Wide aperture f/1.4

	Aperture	f/1.4			Image stabilization	None
	Focus motor	Nikon AF-S			Zoom range	1x
	Fisheye	No			Length	54 mm
	Fixed aperture	n/a			Weight	280 g

"Works for low-light group photography as well as well as landscape photography - Oh, and for macros it can focus much closer than advertised."

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Sigma HSM			Zoom range	2.8x
	Fisheye	No			Length	86 mm
	Fixed aperture	Yes			Weight	0.5 kg

"It feels great, the pictures look great, and it focuses pretty fast. Also, it doesn't make a lot of noise on the videos made with the D90 compared to all my other lenses"

Wide aperture f/1.4

	Aperture	f/1.4			Image stabilization	None
	Focus motor	Sigma HSM			Zoom range	1x
	Fisheye	No			Length	59 mm
	Fixed aperture	n/a			Weight	430 g

"The fact that is has an excellent build of metal and glass let you know that you have a real power tool in your hands."

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Nikon AF-S			Zoom range	3.2x
	Fisheye	No			Length	112 mm
	Fixed aperture	Yes			Weight	0.8 kg

"This lens is for sure a winner in my book, the f/2.8 is nice to balance low light in combination with flash at a lower output it works out really nice for me and my clients. "

More advanced image stabilization Sigma OS

	Aperture	f/2.8			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Zoom range	2.8x
	Fisheye	No			Length	n/a
	Fixed aperture	No			Weight	395 g

"i used to have the 24-70mm f/2.8D EX DG version of this lens, which was ok, but not great at wide open apertures. This lens is an absolute cracker when used wide open!"

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Sigma HSM			Zoom range	2.9x
	Fisheye	No			Length	95 mm
	Fixed aperture	Yes			Weight	n/a

"Wonderful bokeh @ f/1.8, I never had a lens witch such wide aperture and results really stunning. "

	Aperture	f/1.8			Image stabilization	None
	Focus motor	Nikon AF-S			Zoom range	1x
	Fisheye	No			Length	53 mm
	Fixed aperture	n/a			Weight	200 g

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

More advanced image stabilization Sigma OS

	Aperture	f/2.8			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Zoom range	2.9x
	Fisheye	No			Length	n/a
	Fixed aperture	Yes			Weight	0.6 kg

"I just LOVE this lens! Took some of my very best and most interesting effects pictures with it! This lens helped me broaden my horizon as a photographer both figuratively and literally! I NEVER leave this lens at home when I go out for a shoot. And using it for video in some situations also creates spectecular clips. Sharp, fast and a ton of fun!"

Fisheye Extremely wide circular images

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Sigma HSM			Zoom range	1x
	Fisheye	Yes			Length	83 mm
	Fixed aperture	n/a			Weight	n/a