Pentax K Landscape lenses that have a Sigma HSM 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

"This is a great all aroud lens. Love the wide angle I get and just enough zoom for an alround."

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

"This is a solid lens. I'm not 100% convinced the OS in this lens is an improvement over the body image stabilization, but it seems to be roughly equivalent."

More advanced image stabilization Sigma OS

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

"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

"Lens has excellent speed and sharpness."

More advanced image stabilization Sigma OS

	Focus motor	Sigma HSM			Aperture	f/3.8
	Zoom range	6.9x			Max focal length	125 mm
	Image stabilization	Sigma OS			Weight	0.5 kg
	Fixed aperture	No			Diameter	74 mm