Pentax K-m Wide angle lenses

"Nice to have a lens that will work as a fish eye AND a regular wide angle. I took some fun pictures this weekend and was very pleased with the results."

	Fixed aperture	No			Zoom range	2.4x
	Focus motor	None			Max focal length	24 mm
	Image stabilization	None			Length	n/a
	Aperture	f/3.5			Weight	n/a

"This is the lens I have been looking for all these years for nice architecture pictures."

	Fixed aperture	No			Zoom range	2x
	Focus motor	None			Max focal length	20 mm
	Image stabilization	None			Length	81 mm
	Aperture	f/4			Weight	470 g

"This lens is a super-compact, tough, Ultra Wide. It is built tough as a tank and has great sharpness with very light weight."

	Fixed aperture	n/a			Zoom range	1x
	Focus motor	None			Max focal length	15 mm
	Image stabilization	None			Length	40 mm
	Aperture	f/4			Weight	212 g

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

Silent focus motor Silent and fast

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

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

More advanced image stabilization Sigma OS

Silent focus motor Silent and fast

	Fixed aperture	No			Zoom range	4.1x
	Focus motor	Sigma HSM			Max focal length	70 mm
	Image stabilization	Sigma OS			Length	83 mm
	Aperture	f/2.8			Weight	0.5 kg

"Great construction, versatile and great image quality, especially the diaphragm closing a little more than 16mm focal length."

Fixed aperture The same aperture at all focal lengths

Silent focus motor Silent and fast

	Fixed aperture	Yes			Zoom range	3.1x
	Focus motor	Pentax SDM			Max focal length	50 mm
	Image stabilization	None			Length	99 mm
	Aperture	f/2.8			Weight	0.6 kg

"The lens is well-made, the SDM focusing is fast and quiet (used on a Pentax K20D), images are sharp throughout the zoom range, the bokeh is pleasing, and the lens is weatherproof"

Fixed aperture The same aperture at all focal lengths

Silent focus motor Silent and fast

	Fixed aperture	Yes			Zoom range	4.1x
	Focus motor	Pentax SDM			Max focal length	70 mm
	Image stabilization	None			Length	94 mm
	Aperture	f/4			Weight	485 g

"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

Silent focus motor Silent and fast

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