Superzoom specialist Tamron has today announced the development of its most ambitious lens yet, the characteristically snappily-titled AF 18-270mm F/3.5-6.3 Di II VC LD Aspherical (IF) Macro. Designed exclusively for digital SLRs with APS-C sensors, this optic offers a 35mm-equivalent range of 28-419mm, perfect for owners of megazoom compacts looking to upgrade to an SLR, and incorporates the company's 'Vibration Control' optical image stabilisation system. To achieve the spectacular zoom range (billed as the longest in the world),Tamron has used all its design nous, including the use of aspheric elements and low dispersion glass to keep chromatic aberration under control.
Actually the Tamron 18-250 is a pretty decent lens, better than some 18-55 kit lenses in the same range. If optically this new 18-270 will be as good as the 18-250 plus VC, I think it'd have some buyers.
Just wonder how it'd work on a Sony or Pentax cam since there is 'VC' built-in body already. Double VC would be really cool
The test report at Photozone.de
As some have already expected: there are some drawbacks and side effects of the huge zoom range.
What surprises me is the data of the distortion chart: Taken 9 June 2007??