About this product:
The Tamron SP 70-300mm f/4-5.6 Di VC USD Lens is known as one of your better choices when looking for a lens in this zoom range if your not yet ready to purchase one of the more expensive pro quality lenses from Nikon or Canon that can cost over $1000 more then this lens. This lens also compliments many wide to moderate-tele zoom lenses like a 24-70mm for full frame or a 17-70mm for aps-c "cropped" sensor cameras. This lens was Tamron's first to feature the USD (Ultra Sonic Drive) auto focus motor and VC (Vibration Compensation) for image stabilization. With an effective focal length of 112-480mm on Canon APS-C bodies, it can make a great lens for anyone wanting to get into wild life photography and with a aperture of f/4-5.6 it also makes a reasonable portrait lens, while it isn't a f/2.8 lens it can still offer some reasonable background blur. Tamron states this lens can shoot as many as four shutter speeds slower then otherwise possible on none image stabilized lens and over the next few months I will put that to the test.