Just a quick snapshot of a Peacock I took today taken with the Nikon D7100 together with the 18 – 105 Kit lens. I have been using the D7100 for a couple of week now and simply love the camera, I have a large collection of old style NIkon lenses (22 in all) and they all work perfectly on this camera. Of course the older lenses do not have auto focus and can’t use the fully Auto, Shutter or Program modes, but can use use metered manual and Aperture modes. The D7100 can be also programmed to memorize up to 9 lenses, just set the focal length and maximum aperture. The electronic rangefinder will assist you with the correct focus.
Am I worried that this is a DX format camera and not full frame? Not in the least, I just use a wider lens to get everything in. Far too much is made of full frame capture. For HD video one could argue that a shallow depth of field offered by full frame produces a nice movie like effect, but unless you get the focus spot on, then quite frankly it is not worth the trouble, no-one wants to see an out of focus shot on a 50 inch LCD, LED or Plasma screen.