Sony Alpha (Full-frame) Lenses for less than $300 that have a focus motor, have a 100mm or longer focal length and have a f/4 or faster aperture

"Dismounting and mounting us fast. Surprisingly also the focus is fast and good." bhphotovideo.com

	Max focal length	300 mm			Diameter	76 mm
	Aperture	f/4			Length	117 mm
	Focus motor	Generic motor			Auto focus	Yes
	Weight	435 g			Zoom range	4.3x

"I've been using this lens for over a year, and feel it is well worth the money. For a very reasonable price you get a lens that has reasonable sharpness, and an effective macro. There are much cheaper lenses out there and much more expensive ones too. If you are looking for a good zoom lens at a reasonable price, you should put this on your list of top contenders." bhphotovideo.com

	Max focal length	300 mm			Diameter	77 mm
	Aperture	f/4			Length	120 mm
	Focus motor	Generic motor			Auto focus	Yes
	Weight	0.5 kg			Zoom range	4.3x

"I am very satisfied with it already. Good sharp photos, good zooming range." bhphotovideo.com

	Max focal length	300 mm			Diameter	76 mm
	Aperture	f/4			Length	120 mm
	Focus motor	Generic motor			Auto focus	Yes
	Weight	0.5 kg			Zoom range	4.3x