Sony Alpha DSLR-A100 Zoom Telephoto lenses for Sony Alpha (Full-frame) lens mount

"this lens is tack sharp with wonderful bokeh"

Fixed aperture The same aperture at all focal lengths

Wide aperture f/2.8

Silent focus motor Silent and fast

	Fixed aperture	Yes			Max focal length	200 mm
	Image stabilization	None			Weight	1.4 kg
	Focus motor	Sony SSM			Length	197 mm
	Aperture	f/2.8			Zoom range	2.9x

"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

Wide aperture f/2.8

Silent focus motor Silent and fast

	Fixed aperture	Yes			Max focal length	200 mm
	Image stabilization	None			Weight	1.4 kg
	Focus motor	Sigma HSM			Length	184 mm
	Aperture	f/2.8			Zoom range	2.9x

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

Silent focus motor Silent and fast

	Fixed aperture	No			Max focal length	400 mm
	Image stabilization	None			Weight	1.6 kg
	Focus motor	Sony SSM			Length	196 mm
	Aperture	f/4			Zoom range	5.7x

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

More advanced image stabilization Sigma OS

Silent focus motor Silent and fast

	Fixed aperture	No			Max focal length	400 mm
	Image stabilization	Sigma OS			Weight	1.7 kg
	Focus motor	Sigma HSM			Length	204 mm
	Aperture	f/4.5			Zoom range	3.3x

"I took it to Yellowstone on my first outing with it. I got some great shots of many aminals off in the distance."

Great telephoto lens 500 mm

More advanced image stabilization Sigma OS

Silent focus motor Silent and fast

	Fixed aperture	No			Max focal length	500 mm
	Image stabilization	Sigma OS			Weight	1.9 kg
	Focus motor	Sigma HSM			Length	252 mm
	Aperture	f/5			Zoom range	3.3x

"LENS IS A FANTASTIC, worth every penny, is a bit heavy, but worth it. IS HIGHLY RECOMMENDED. AND WITH THE 18-85 MM, is the perfect companion."

Silent focus motor Silent and fast

	Fixed aperture	No			Max focal length	300 mm
	Image stabilization	None			Weight	0.8 kg
	Focus motor	Sony SSM			Length	137 mm
	Aperture	f/4.5			Zoom range	4.3x

"It works great, lots of close ups and lets in plenty of light in ice rink."

Fixed aperture The same aperture at all focal lengths

Wide aperture f/2.8

	Fixed aperture	Yes			Max focal length	200 mm
	Image stabilization	None			Weight	1.1 kg
	Focus motor	None			Length	194 mm
	Aperture	f/2.8			Zoom range	2.9x

"It reveals very nice skin texture and fine detail at 300mm at a distance away from the subject and for me is the best quality lens i've tried over this range for the A900 + constant f4 is nice."

Fixed aperture The same aperture at all focal lengths

	Fixed aperture	Yes			Max focal length	300 mm
	Image stabilization	None			Weight	1.5 kg
	Focus motor	None			Length	224 mm
	Aperture	f/4			Zoom range	3x