>Hello, all. I am looking to do some lens upgrading for my >D7000 and would like some recommendations. I have no immediate >plans of upgrading my camera to FX. I currently have the >following Nikon lenses: 18-105, 35/1.8G, and 50/1.8G. I have >grandchildren who are involved in indoors and outdoors sports; >I like to take portraits, and love to take landscapes. I am >looking to abandon the 18-105 kit lens. Thanks for sharing >your experiences.
Your 18-105mm probably does a good job with the landscapes. The 16-85mm would get you a little wider with marginally better IQ. The 17-55mm f/2.8 lenses (multiple manufacturers) are great for indoors. They also work for landscapes but f/2.8 is not normally needed for that. (You do have a tripod, right?)
The 70-300mm VR is good for outdoor daytime sports. Indoors and nighttime outdoors will need an f/2.8 zoom or f/1.x primes to get the needed shutter speeds (high ISO is a given).
Your 18-105mm might do OK for portraits. Your 50mm should be OK, too. The 85mm f/1.8 can be a good option. If you want to stand back further, the f/2.8 and f/4 versions of the 70-200mm will work well.
---------+---------+---------+---------+---------+ Joseph K Seattle, WA, USA