If you're not sold on either Tamron 16-300mm or Nikon 18-300mm, here are some options: • Sigma 18-300mm f/3.5-6.3 Macro OS HSM C combines small size, fast focusing speeds, and a reasonable price to give you a serious option. Features optical stabilization, the Hyper Sonic Motor AF System, one SLD, and four FLD elements. • Olympus M.Zuiko Digital 12-200mm f/3.5-6.3 has a zoom range of 16.6x zoom and is both dust and splashproof. On top of taking shots of objects that are far away, you can also use this for regular, very wide-angle shots. • Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM is equivalent to 27-375mm on APS-C cameras. It offers four stops of image stabilization and a micro-motor autofocus motor.