Sony SLT-A77 Zoom Lenses

"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."

Silent focus motor Silent and fast

More advanced image stabilization Sigma OS

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

"Sigma's new Optical Stabilizer is very effective. Focus is pretty much instantaneous, and silent."

Fixed aperture The same aperture at all focal lengths

Silent focus motor Silent and fast

More advanced image stabilization Sigma OS

	Zoom range	2.9x			Max focal length	50 mm
	Fixed aperture	Yes			Aperture	f/2.8
	Focus motor	Sigma HSM			Weight	0.6 kg
	Image stabilization	Sigma OS			Min focal length	17 mm

"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

Silent focus motor Silent and fast

	Zoom range	2x			Max focal length	20 mm
	Fixed aperture	Yes			Aperture	f/3.5
	Focus motor	Sigma HSM			Weight	0.5 kg
	Image stabilization	None			Min focal length	10 mm

"Fantastic lens, great focal range,fast focus, very sharp. Perfect all around lens."

Great zoom range 13.9x

Great telephoto lens 250 mm

	Zoom range	13.9x			Max focal length	250 mm
	Fixed aperture	No			Aperture	f/3.5
	Focus motor	None			Weight	440 g
	Image stabilization	None			Min focal length	18 mm

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

Silent focus motor Silent and fast

More advanced image stabilization Sigma OS

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

"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

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

"Clear and robust, for the lovers who enjoy to "shot" nature and indoor environments without use flash mode. For those who search for good angles, clear images and definitions."

Fixed aperture The same aperture at all focal lengths

	Zoom range	1.5x			Max focal length	16 mm
	Fixed aperture	Yes			Aperture	f/2.8
	Focus motor	None			Weight	0.6 kg
	Image stabilization	None			Min focal length	11 mm

"This lens does very well on my Alpha 700. It has a quick and accurate autofocus and the pictures are sharp and of good contrast."

Great zoom range 13.9x

Silent focus motor Silent and fast

More advanced image stabilization Sigma OS

	Zoom range	13.9x			Max focal length	250 mm
	Fixed aperture	No			Aperture	f/3.5
	Focus motor	Sigma HSM			Weight	0.6 kg
	Image stabilization	Sigma OS			Min focal length	18 mm