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

"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			Min focal length	30 mm
	Fisheye	No			Max focal length	30 mm
	Fixed aperture	n/a			Zoom range	1x

"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
	Focus motor	Sigma HSM			Min focal length	50 mm
	Fisheye	No			Max focal length	50 mm
	Fixed aperture	n/a			Zoom range	1x

"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
	Focus motor	Sigma HSM			Min focal length	150 mm
	Fisheye	No			Max focal length	150 mm
	Fixed aperture	n/a			Zoom range	1x

"Amazing very nice lens."

More advanced image stabilization Sigma OS

	Aperture	f/2.8			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Min focal length	17 mm
	Fisheye	No			Max focal length	50 mm
	Fixed aperture	Yes			Zoom range	2.9x

"It focuses very fast, and very quiet. Sigma did something right with the HSM (not like my other Sigma lens that hunts to focus and is pretty noisy). The images come out very sharp prior to any post-processing and colors seem very accurate. All in all, I love this lens. Worth every penny!"

Fisheye Extremely wide circular images

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Sigma HSM			Min focal length	10 mm
	Fisheye	Yes			Max focal length	10 mm
	Fixed aperture	n/a			Zoom range	1x

"This is a grat lens that you can have a lot of fun with and be very creative. Crop the image and it get's even better. Excellent quality."

Fisheye Extremely wide circular images

	Aperture	f/2.8			Image stabilization	None
	Focus motor	Sigma HSM			Min focal length	4.5 mm
	Fisheye	Yes			Max focal length	4.5 mm
	Fixed aperture	n/a			Zoom range	1x

"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			Min focal length	17 mm
	Fisheye	No			Max focal length	70 mm
	Fixed aperture	No			Zoom range	4.1x