Pentax K Landscape lenses made by Sigma that have a focus motor

"This lens is absolutely great for scenery and landscape. I did a lot of research for a good wide-angle lens and for the price this lens was definitely my favorite."

Fixed aperture The same aperture at all focal lengths

	Focus motor	Sigma HSM			Aperture	f/3.5
	Zoom range	2x			Max focal length	20 mm
	Image stabilization	None			Weight	0.5 kg
	Fixed aperture	Yes			Diameter	87 mm

"This is best zoom ultra wide lens for crop sensor.Easy focusing in AF and Manual modes."

	Focus motor	Sigma HSM			Aperture	f/4.5
	Zoom range	2x			Max focal length	16 mm
	Image stabilization	None			Weight	0.6 kg
	Fixed aperture	No			Diameter	n/a

"The is a great upgrade from a kit lens. Good focal length range, speed and macro ability."

More advanced image stabilization Sigma OS

	Focus motor	Sigma HSM			Aperture	f/2.8
	Zoom range	4.1x			Max focal length	70 mm
	Image stabilization	Sigma OS			Weight	0.5 kg
	Fixed aperture	No			Diameter	79 mm

"I gave it 5 stars based on what I would expect from a zoom lens and the image quality is really quite impressive for a super zoom; better than anything else of this type that I've seen. It is a good, solid, well made lens and I couldn't be happier with it."

Great zoom range 13.9x

Great telephoto lens 250 mm

More advanced image stabilization Sigma OS

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