Sony SLT-A77 Lenses that have a focus motor

"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			Max focal length	50 mm
	Fisheye	No			Aperture	f/2.8
	Fixed aperture	Yes			Zoom range	2.9x
	Image stabilization	Sigma OS			Weight	0.6 kg

"I use this lens in architecture photo and I find it really great as it is possible to take otherwise impossible images indoor and images with spectacular distortion of the spaces outdoor."

Fisheye Extremely wide circular images

	Focus motor	Sigma HSM			Max focal length	10 mm
	Fisheye	Yes			Aperture	f/2.8
	Fixed aperture	n/a			Zoom range	1x
	Image stabilization	None			Weight	475 g

"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			Max focal length	20 mm
	Fisheye	No			Aperture	f/3.5
	Fixed aperture	Yes			Zoom range	2x
	Image stabilization	None			Weight	0.5 kg

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

More advanced image stabilization Sigma OS

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

"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			Max focal length	200 mm
	Fisheye	No			Aperture	f/4
	Fixed aperture	No			Zoom range	4x
	Image stabilization	Sigma OS			Weight	n/a