Zoom Landscape lenses for less than $500 that have a Sigma HSM focus motor and are 18mm or wider

"This lens is really great. The picture quality is awsome. It can make great proxy. I've shot a picture of a spider and i can see the hair over his eyes." bhphotovideo.com

More advanced image stabilization Sigma OS

	Min focal length	17 mm			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Max focal length	70 mm
	Zoom range	4.1x			Aperture	f/2.8
	Fixed aperture	No			Diameter	79 mm

"So what is great about it? Well most everything I would say. It is a performer, it's sharp, it's light, it's sturdy, easy to use, and a good all round lens, and also it's easy on your budget from B & H." bhphotovideo.com

More advanced image stabilization Sigma OS

	Min focal length	17 mm			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Max focal length	70 mm
	Zoom range	4.1x			Aperture	f/2.8
	Fixed aperture	No			Diameter	79 mm

"Takes great, clear, sharp photgraphs." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Max focal length	20 mm
	Zoom range	2x			Aperture	f/3.5
	Fixed aperture	Yes			Diameter	86 mm

"This has become a lens I must have with me. Use it appropriately and it is sharp with minimal to no vignetting." bhphotovideo.com

	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Max focal length	20 mm
	Zoom range	2x			Aperture	f/4
	Fixed aperture	No			Diameter	86 mm

"The zoom is smooth once you get the handle of it, and its low light capability is excellent considering the price." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

More advanced image stabilization Sigma OS

	Min focal length	17 mm			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Max focal length	50 mm
	Zoom range	2.9x			Aperture	f/2.8
	Fixed aperture	Yes			Diameter	84 mm

"Amazing very nice lens." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

More advanced image stabilization Sigma OS

	Min focal length	17 mm			Image stabilization	Sigma OS
	Focus motor	Sigma HSM			Max focal length	50 mm
	Zoom range	2.9x			Aperture	f/2.8
	Fixed aperture	Yes			Diameter	84 mm

"The lens is great, especially If you like taking interior shots or panoramic, architectural buildings, architectural models." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Max focal length	20 mm
	Zoom range	2x			Aperture	f/3.5
	Fixed aperture	Yes			Diameter	86 mm