It’s been around in various forms for more than 10 years. In a departure, we did our latest test as if on an APS-C camera, since it’s also sold in a kit with the Canon EOS 50D.
Standout Spec: Almost no distortion at 70- and 135mm.
Lens Test: Canon 28-135mm f/3.5-5.6 IS USM AF
Nikon AF Nikkor 28mm f/2.8D
Tamron AF 28-80mm f/3.5-5.6
Sigma 28mm f/1.8 EX DG Macro
Tamron 28-75mm f/2.8 XR DI
Tamron 28-300mm f/3.5-6.3 XR LD