Pentax K 50mm Portrait lenses made by Sigma

"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."

Silent focus motor Silent and fast

	Focus motor	Sigma HSM			Length	68 mm
	Aperture	f/1.4			Auto focus	Yes
	Weight	0.5 kg			Zoom range	1x
	Diameter	85 mm			Fisheye	No

"This lens is useful in applications where a slightly longer than normal focal length is required. This lens makes a nice portrait lens for those on a budget. I was pleasantly surprised how sharp this lens is. The macro function is another nice touch."

	Focus motor	None			Length	64 mm
	Aperture	f/2.8			Auto focus	Yes
	Weight	315 g			Zoom range	1x
	Diameter	71 mm			Fisheye	No