Tamron SP 24-70mm F/2.8 DI VC USD Zoom Lens

Pros:

• Price - It is 35% cheaper than Canon's version of the same lens

• Warranty – 6 year warranty from Tamron in the United States

• Optics – 9 elements of the 17 specifically enhance image quality issues

• Vibration Compensation (VC) – Tamron is the only company that offers VC for this focal length

• Build Quality – Excellent build quality

• Weather Sealing – Rubber ring to seal lens against the camera body

• Image Quality (IQ) – Ranks with Canon and Nikon's comparable lens in terms of IQ

• Superior Performance (SP) Tamron's SP lens are made with little regard to cost constraints, yet more affordable than many competitors

• Bokeh – Please blur in background due to 9 rounded aperture blades

Cons:

• Heavy Vingetting – dark in the corners, but correctable during editing

• Weight – 29.1 ounces may feel heavy to some users

• Warranty – Warranty is non transferrable