The new Tamron SP AF17-50mm VC will now be available for the Canon EF mount. The high speed f/2.8 wide-to-moderate-telephoto zoom lens for APS-C size format SP AF17-50mm F/2.8 XR Di II VC LD Aspherical [IF] (Model B005) will be on sale in Japan starting October 29.
The chief attraction of VC, according to Tamron, is its excellent tracking performance and extremely stable, shake-free viewfinder image. The VC mechanism employs a three-coil system, whereby three driving coils activate the shake-compensating VC lens group electromagnetically via three steel ball bearings. The result is an ultra smooth compensating movement with virtually no friction, the company said.
Its lens construction consists of 19 elements in 14 groups. Maximum magnification ratio is 1:4.8 and minimum focus distance is 0.29mm.
[Site: Tamron Japan]