Four Thirds Zoom Lenses that have a generic focus motor and have a f/4 or faster aperture

"I am delighted with this 140-600mm lense as it enables me to get close shots of birds and wildlife and has great clarity and sharpness for a moderately priced lense." bhphotovideo.com

Great telephoto lens 300 mm

	Aperture	f/4			Length	127 mm
	Focus motor	Generic motor			Zoom range	4.3x
	Fixed aperture	No			Max focal length	300 mm
	Weight	0.6 kg			Diameter	80 mm

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

	Aperture	f/4			Length	74 mm
	Focus motor	Generic motor			Zoom range	2x
	Fixed aperture	No			Max focal length	18 mm
	Weight	275 g			Diameter	79 mm

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

Fixed aperture The same maximum aperture at all focal lengths

	Aperture	f/4			Length	119 mm
	Focus motor	Generic motor			Zoom range	2x
	Fixed aperture	Yes			Max focal length	14 mm
	Weight	0.8 kg			Diameter	86 mm

"Light weight and easy to handle. Imagages are very sharp and bright." bhphotovideo.com

	Aperture	f/4			Length	72 mm
	Focus motor	Generic motor			Zoom range	3.8x
	Fixed aperture	No			Max focal length	150 mm
	Weight	220 g			Diameter	66 mm

"For routine use. the light weight, and compactness of the E-500/14-42 combo can be a real advantage." bhphotovideo.com

	Aperture	f/3.5			Length	61 mm
	Focus motor	Generic motor			Zoom range	3x
	Fixed aperture	No			Max focal length	42 mm
	Weight	190 g			Diameter	66 mm

"Love the clarity, love the 2.8. The wide angle gives me the ability to shoot a larger area closer and make the shots more interesting. For shooting groups of people it is wonderful." bhphotovideo.com

	Aperture	f/2.8			Length	93 mm
	Focus motor	Generic motor			Zoom range	2x
	Fixed aperture	No			Max focal length	22 mm
	Weight	485 g			Diameter	75 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			Length	88 mm
	Focus motor	Generic motor			Zoom range	3.9x
	Fixed aperture	No			Max focal length	54 mm
	Weight	440 g			Diameter	74 mm

"The lens is much better than the stock lens. It gives great depth of field when on the end of the lens and has a nice reach." bhphotovideo.com

Great zoom range 10x

	Aperture	f/3.5			Length	85 mm
	Focus motor	Generic motor			Zoom range	10x
	Fixed aperture	No			Max focal length	180 mm
	Weight	435 g			Diameter	78 mm

"This lens is very useful in low light and with fast action events. The lens is very fast (bright) which allows for fast shutter speeds to capture the action" bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

Wide aperture f/2

	Aperture	f/2			Length	214 mm
	Focus motor	Generic motor			Zoom range	2.9x
	Fixed aperture	Yes			Max focal length	100 mm
	Weight	1.7 kg			Diameter	97 mm

"It was perfect for several graduations. I generally use it with my E3 body, which makes the whole system very weather resistant." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

Great telephoto lens 250 mm

	Aperture	f/2.8			Length	277 mm
	Focus motor	Generic motor			Zoom range	2.8x
	Fixed aperture	Yes			Max focal length	250 mm
	Weight	3.3 kg			Diameter	125 mm