Low light lenses that have a focus motor

"Absolutely love the speed of the lens in combination with real wide-angle. Optical quality is top class, as expected for L-class."

	Focus motor	Canon USM			Length	87 mm
	Min focal length	24 mm			Aperture	f/1.4
	Max focal length	24 mm			Diameter	94 mm
	Weight	0.6 kg			Auto focus	Yes

"I love this lens. It is nice to buy a product and exceed expectations."

	Focus motor	Sigma HSM			Length	68 mm
	Min focal length	50 mm			Aperture	f/1.4
	Max focal length	50 mm			Diameter	85 mm
	Weight	0.5 kg			Auto focus	Yes

"In my use of the lens with a Sigma mount, I have found it to be very good. The build quality is very good."

	Focus motor	Sigma HSM			Length	68 mm
	Min focal length	50 mm			Aperture	f/1.4
	Max focal length	50 mm			Diameter	85 mm
	Weight	0.5 kg			Auto focus	Yes

"I use this lens with a Sigma SD14 for fashion photography and portraits and I get stunning quality."

	Focus motor	Sigma HSM			Length	59 mm
	Min focal length	30 mm			Aperture	f/1.4
	Max focal length	30 mm			Diameter	76 mm
	Weight	430 g			Auto focus	Yes

"Can not compare it with any other lens. This is THE lens for portrait photography "

	Focus motor	Canon USM			Length	n/a
	Min focal length	50 mm			Aperture	f/1.2
	Max focal length	50 mm			Diameter	n/a
	Weight	0.6 kg			Auto focus	Yes

"I was told how good this lens is, but it is much better than they said. It is not as heavy as everyone said. i find it just as it should be. If that is a ten carat diamond it should weight like one."

	Focus motor	Canon USM			Length	n/a
	Min focal length	85 mm			Aperture	f/1.2
	Max focal length	85 mm			Diameter	n/a
	Weight	1 kg			Auto focus	Yes

"This is a great portrait lense. Well built, quick and sharp focus."

	Focus motor	Sigma HSM			Length	74 mm
	Min focal length	50 mm			Aperture	f/1.4
	Max focal length	50 mm			Diameter	85 mm
	Weight	0.5 kg			Auto focus	Yes

"I have been very satisfied: this lens is absolutely great for low light, or portraiture, requiring large apertures. I shoot with a Pentax k-x, non full-frame, and so the focal length is closer to 85 mm, perfect for portraits."

	Focus motor	Sigma HSM			Length	68 mm
	Min focal length	50 mm			Aperture	f/1.4
	Max focal length	50 mm			Diameter	85 mm
	Weight	0.5 kg			Auto focus	Yes

"Very happy with this lens. Tack sharp even wide open. Very little distortion, fast focus..... what else could you want???"

	Focus motor	Nikon AF-S			Length	89 mm
	Min focal length	24 mm			Aperture	f/1.4
	Max focal length	24 mm			Diameter	83 mm
	Weight	0.6 kg			Auto focus	Yes