Four Thirds Low light lenses that have a generic focus motor and have a f/4 or faster aperture

"I use this mostly as a macro lens in conjunction with the ring flash. It does a stellar job with that, especially with flowers. I have also been happy with it as a portrait lens for indoor use; for outdoor portraits I prefer my 35-100 Zuiko zoom lens." bhphotovideo.com

	Aperture	f/2			Weight	300 g
	Focus motor	Generic motor			Diameter	71 mm
	Auto focus	No			Min focal length	50 mm
	Length	62 mm			Max focal length	50 mm

"The real benefit of course is that it maintains the DOF of a 150mm lens at its effective new focal length, plus the gain of a stop of aperture speed." bhphotovideo.com

Supports autofocus Easier to use

	Aperture	f/2			Weight	1.6 kg
	Focus motor	Generic motor			Diameter	100 mm
	Auto focus	Yes			Min focal length	150 mm
	Length	150 mm			Max focal length	150 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

Supports autofocus Easier to use

	Aperture	f/2			Weight	1.7 kg
	Focus motor	Generic motor			Diameter	97 mm
	Auto focus	Yes			Min focal length	35 mm
	Length	214 mm			Max focal length	100 mm