Tamron announced a new version of their 70-300mm lens, this time with a ultrasonic focus motor (lens-based motor). The SP AF70-300mm f/4-5.6 Di VC USD (can we get any more acronyms in their guys?) features a faster and quieter in-lens motor than previous Tamron models, and is the first lens to feature this new system. Essentially this is an update to a lens announced last year, but with a faster in-lens motor, more optical coatings, and loss of macro abilities.