Samsung GX-20 Wide angle lenses that have a f/2.8 or faster aperture

"The is a great upgrade from a kit lens. Good focal length range, speed and macro ability."

More advanced image stabilization Sigma OS

Silent focus motor Silent and fast

	Aperture	f/2.8			Image stabilization	Sigma OS
	Fixed aperture	No			Zoom range	4.1x
	Focus motor	Sigma HSM			Max focal length	70 mm
	Auto focus	Yes			Length	83 mm

"Great lens for everyday use... Fast and sharp.... The price was nice also"

Fixed aperture The same aperture at all focal lengths

Silent focus motor Silent and fast

	Aperture	f/2.8			Image stabilization	None
	Fixed aperture	Yes			Zoom range	3.1x
	Focus motor	Pentax SDM			Max focal length	50 mm
	Auto focus	Yes			Length	99 mm

"This is a solid lens. I'm not 100% convinced the OS in this lens is an improvement over the body image stabilization, but it seems to be roughly equivalent."

More advanced image stabilization Sigma OS

Silent focus motor Silent and fast

	Aperture	f/2.8			Image stabilization	Sigma OS
	Fixed aperture	No			Zoom range	2.8x
	Focus motor	Sigma HSM			Max focal length	50 mm
	Auto focus	Yes			Length	n/a

"A really wonderful wide angle lens that I use for landscape photography. A fast lens with great field of view and little discernable distortion"

	Aperture	f/2.8			Image stabilization	None
	Fixed aperture	n/a			Zoom range	1x
	Focus motor	None			Max focal length	14 mm
	Auto focus	Yes			Length	69 mm

"The quality of the lens feels great and you come away feeling like you're getting a lot for your money. The ability to lock it into 17mm is handy for transportation and twisting it onto your body. The AF is audible but not loud enough to make it seem cheap."

Fixed aperture The same aperture at all focal lengths

	Aperture	f/2.8			Image stabilization	None
	Fixed aperture	Yes			Zoom range	2.9x
	Focus motor	None			Max focal length	50 mm
	Auto focus	Yes			Length	82 mm