Four Thirds Lenses that are 14mm or wider and have a f/4 or faster aperture

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

	Aperture	f/4			Auto focus	Yes
	Min focal length	9 mm			Zoom range	2x
	Fisheye	No			Diameter	79 mm
	Fixed aperture	No			Length	74 mm

"I am an avid amateur photographer and have found this lens to fill most of my needs. Although this lens is a bit heavy, the quality of craftmenship is very apparent. The image color quality is outstanding and it maintains detail out to the image margins even at 12mm. Good macro capability as well." bhphotovideo.com

Great zoom range 5x

	Aperture	f/2.8			Auto focus	Yes
	Min focal length	12 mm			Zoom range	5x
	Fisheye	No			Diameter	80 mm
	Fixed aperture	No			Length	99 mm

"Super sharp, wicked quality. Incredible for landscape photography!" bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

	Aperture	f/4			Auto focus	Yes
	Min focal length	7 mm			Zoom range	2x
	Fisheye	No			Diameter	86 mm
	Fixed aperture	Yes			Length	119 mm

"It's very light (not aluminum like the 70s) but the depth of field is surprisingly minimal for a lens of this size" bhphotovideo.com

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	14 mm			Zoom range	3x
	Fisheye	No			Diameter	66 mm
	Fixed aperture	No			Length	61 mm

"The build quality is the best I've ever seen in my many decades of photography. Even if you never took a picture with it, it would still be a work of art" bhphotovideo.com

Fisheye Extremely wide circular images

	Aperture	f/3.5			Auto focus	Yes
	Min focal length	8 mm			Zoom range	1x
	Fisheye	Yes			Diameter	77 mm
	Fixed aperture	n/a			Length	79 mm

"This is the lens that will stay on my camera 90% of the time. Good all around lens." bhphotovideo.com

	Aperture	f/2.8			Auto focus	Yes
	Min focal length	11 mm			Zoom range	2x
	Fisheye	No			Diameter	75 mm
	Fixed aperture	No			Length	93 mm

"Very sharp, fast and heavy. I use an SLR mostly to photograph flat art where I need a better tonal scale than smaller sensors." bhphotovideo.com

	Aperture	f/2.8			Auto focus	Yes
	Min focal length	14 mm			Zoom range	3.9x
	Fisheye	No			Diameter	74 mm
	Fixed aperture	No			Length	88 mm

"All I can say is WOW! Terrific for night and low light shooting, ultra fast focusing, wonderful bokeh." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

Wide aperture f/2

	Aperture	f/2			Auto focus	Yes
	Min focal length	14 mm			Zoom range	2.5x
	Fisheye	No			Diameter	86 mm
	Fixed aperture	Yes			Length	123 mm