Announced early in December 2010, Tamron's 18-270mm f/3.5-6.3 Di II VC PZD lens introduces a new PZD (Piezo Drive) ultrasonic motor that delivers faster and quieter autofocusing. Claimed as the world's most compact, lightweight lens with a 15x zoom ratio it is designed for DSLR cameras with APS-C...
You want a general-purpose zoom lens that covers most types of subjects; You'd like a lens that requires no readjustment when you fit polarisers and graduated filters; You're happy to shoot and process raw files to optimise imaging performance
You need close focusing and macro capabilities; You want a lens for a camera with a 36 x 24 mm sensor; You need a lens with excellent flatness of field for architectural photography and copying