Sony Alpha DSLR-A390 Zoom Lenses made by Sigma

"The lens feels very solid and well made."

Fixed aperture The same aperture at all focal lengths

More advanced image stabilization Sigma OS

	Max focal length	50 mm			Aperture	f/2.8
	Fixed aperture	Yes			Length	n/a
	Image stabilization	Sigma OS			Min focal length	17 mm
	Focus motor	Sigma HSM			Weight	0.6 kg

"I have yet to really put this lens through its paces, but so far I am very satisfied."

Fixed aperture The same aperture at all focal lengths

	Max focal length	20 mm			Aperture	f/3.5
	Fixed aperture	Yes			Length	88 mm
	Image stabilization	None			Min focal length	10 mm
	Focus motor	Sigma HSM			Weight	0.5 kg

"Use in everyday photography, fast focusing and great quality pictures."

More advanced image stabilization Sigma OS

	Max focal length	50 mm			Aperture	f/2.8
	Fixed aperture	No			Length	n/a
	Image stabilization	Sigma OS			Min focal length	18 mm
	Focus motor	Sigma HSM			Weight	395 g

"This glass is sharp! At f8.0 I didn't feel the need to sharpen images in post; and the quality of the bokeh is very pleasing."

Fixed aperture The same aperture at all focal lengths

	Max focal length	70 mm			Aperture	f/2.8
	Fixed aperture	Yes			Length	95 mm
	Image stabilization	None			Min focal length	24 mm
	Focus motor	Sigma HSM			Weight	0.7 kg

"Quick and quiet autofocus. Tack sharp at 5.6. Also extremely sharp at 2.8."

Fixed aperture The same aperture at all focal lengths

	Max focal length	200 mm			Aperture	f/2.8
	Fixed aperture	Yes			Length	184 mm
	Image stabilization	None			Min focal length	70 mm
	Focus motor	Sigma HSM			Weight	1.4 kg

"Wow, Great lens from 120 to 400mm nice photos and pretty fast for under $1000.00 lens."

Great telephoto lens 400 mm

More advanced image stabilization Sigma OS

	Max focal length	400 mm			Aperture	f/4.5
	Fixed aperture	No			Length	204 mm
	Image stabilization	Sigma OS			Min focal length	120 mm
	Focus motor	Sigma HSM			Weight	1.7 kg

"Captured tons of amazing shots of birds and wildlife. Images crisp, clear; even at 200mm.- Great quality, easy to focus, quick focus, good aperture.- No cons."

More advanced image stabilization Sigma OS

	Max focal length	200 mm			Aperture	f/4
	Fixed aperture	No			Length	102 mm
	Image stabilization	Sigma OS			Min focal length	50 mm
	Focus motor	Sigma HSM			Weight	n/a

"Excellent - fast, perfect zoom range, and quality of image with this zoom lens speaks volumes. Reasonably priced. 18mm-50mm range is a perfect "Default" lens for quick shooting. A super alternative to more pricey Zuiko lenses."

Fixed aperture The same aperture at all focal lengths

	Max focal length	50 mm			Aperture	f/2.8
	Fixed aperture	Yes			Length	86 mm
	Image stabilization	None			Min focal length	18 mm
	Focus motor	None			Weight	450 g

"This lens is VERY SHARP, even at f2.8. At f5.6 it really shines. I have used several Sigma EX lenses and I would give this lens a very strong recommendation."

Fixed aperture The same aperture at all focal lengths

	Max focal length	70 mm			Aperture	f/2.8
	Fixed aperture	Yes			Length	115 mm
	Image stabilization	None			Min focal length	24 mm
	Focus motor	None			Weight	0.7 kg