Canon EF Lenses for less than $500 that have a Canon USM focus motor, have a 100mm or longer focal length and have a f/4 or faster aperture

"The optics are everything that I had expected and more." bhphotovideo.com

Fixed aperture The same maximum aperture at all focal lengths

More advanced image stabilization Canon IS

	Max focal length	105 mm			Fixed aperture	Yes
	Aperture	f/4			Zoom range	4.4x
	Focus motor	Canon USM			Length	107 mm
	Image stabilization	Canon IS			Min focal length	24 mm

"This is the lens i have wanted for a few years, I had purchased the NON IS lens 5 years ago and had somne decent results with it, but using the IS Lens is a shear joy." bhphotovideo.com

More advanced image stabilization Canon IS

	Max focal length	300 mm			Fixed aperture	No
	Aperture	f/4			Zoom range	4.3x
	Focus motor	Canon USM			Length	142 mm
	Image stabilization	Canon IS			Min focal length	70 mm

"Great lens! I use this lens to take pictures of sporting events indoors, volleyball and basketball. The lens has proven itself time and time again. It is so fun to see the images that the lens captures. Highly recommended for indoor sports with low light." bhphotovideo.com

Wide aperture f/2

	Max focal length	100 mm			Fixed aperture	n/a
	Aperture	f/2			Zoom range	1x
	Focus motor	Canon USM			Length	74 mm
	Image stabilization	None			Min focal length	100 mm