(Credit: Tamron)Tamron announced yesterday that its 28mm-300mm f/3.5-5.6 XR Di VC LD Aspherical Macro lens will now have a built-in AF motor allowing it to be used with Nikon's D60, D40x, and D40 DSLRs. Tamron's compact superzoom was first introduced in October 2007. It has a broad zoom range stretching from 28mm to 300mm, and employs Tamron's Vibration Compensation image stabilization system. It earns its macro designation by maintaining a 19.2-inch minimum focusing distance over the entire zoom range, with a maximum magnification of 1:3 at 300mm. It will be launched in Japan at the end of May.