Sony Alpha DSLR-A100 Zoom Lenses that have a focus motor

"this lens is tack sharp with wonderful bokeh"

Fixed aperture The same aperture at all focal lengths

	Focus motor	Sony SSM			Aperture	f/2.8
	Fixed aperture	Yes			Length	197 mm
	Max focal length	200 mm			Weight	1.4 kg
	Image stabilization	None			Min focal length	70 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

More advanced image stabilization Sigma OS

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

"I tested the lens last night. It is very sharp and as advertised."

Fixed aperture The same aperture at all focal lengths

	Focus motor	Sony SSM			Aperture	f/2.8
	Fixed aperture	Yes			Length	114 mm
	Max focal length	35 mm			Weight	0.9 kg
	Image stabilization	None			Min focal length	16 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

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

"This is a very functional lens in low light situations when using a monopod. I used it for a show inside of an event center with a lot of success (if you are looking for motion blur in your action shots). Overall I really like the lens and would recommend it."

More advanced image stabilization Sigma OS

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

"This is a fantastic lens. It is super fast, very sharp, and so true to color."

Fixed aperture The same aperture at all focal lengths

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

"Having the f2.8 throughout the range allows the pictures to be light without noise. It focuses super quick."

Fixed aperture The same aperture at all focal lengths

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

"It is sharp wide open, focuses fast,handles easily, and weighs less than my 2.8 300"

Great telephoto lens 400 mm

Great zoom range 5.7x

	Focus motor	Sony SSM			Aperture	f/4
	Fixed aperture	No			Length	196 mm
	Max focal length	400 mm			Weight	1.6 kg
	Image stabilization	None			Min focal length	70 mm

"Its well balanced. Overall nice glass!"

Great telephoto lens 400 mm

More advanced image stabilization Sigma OS

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

"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

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