Landscape lenses that have a focus motor, are 10mm or wider and have a f/4 or faster aperture

"This ultra-wide angle lens offers tack-sharp possibilities even around the edges." bhphotovideo.com

Supports autofocus Easier to use

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	10 mm			Image stabilization	None
	Focus motor	Canon USM			Diameter	84 mm
	Fixed aperture	No			Length	90 mm

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

Supports autofocus Easier to use

Fixed aperture The same maximum aperture at all focal lengths

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Diameter	86 mm
	Fixed aperture	Yes			Length	89 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

Supports autofocus Easier to use

	Aperture	f/4			Auto focus	Yes
	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Diameter	86 mm
	Fixed aperture	No			Length	89 mm

"The exciting perspective and wide field of view combined with excellent sharpness make this lens a winner. It's a welcome addition to the Lumix G line." bhphotovideo.com

Supports autofocus Easier to use

Fixed aperture The same maximum aperture at all focal lengths

	Aperture	f/4			Auto focus	Yes
	Min focal length	7 mm			Image stabilization	None
	Focus motor	Generic motor			Diameter	70 mm
	Fixed aperture	Yes			Length	83 mm

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

Supports autofocus Easier to use

Fixed aperture The same maximum aperture at all focal lengths

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	10 mm			Image stabilization	None
	Focus motor	Sigma HSM			Diameter	86 mm
	Fixed aperture	Yes			Length	89 mm

"This is my first wide angle zoom and I don't see a reason to purchase another. Color and contrast are great, good edge to edge sharpness. Zoom ring is tight and well dampened." bhphotovideo.com

Supports autofocus Easier to use

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	10 mm			Image stabilization	None
	Focus motor	Generic motor			Diameter	79 mm
	Fixed aperture	No			Length	99 mm

"I found the lens solid in feel, easy to change, quick enough focussing" bhphotovideo.com

Supports autofocus Easier to use

	Aperture	f/4			Auto focus	Yes
	Min focal length	9 mm			Image stabilization	None
	Focus motor	Generic motor			Diameter	79 mm
	Fixed aperture	No			Length	74 mm