Nikon Lens Simulator:

Nikkor Lens Simulator

Buying new glass or need to see what the focal length is with lenses you have look like on different camera bodies then try out Nikon’s website that has a Lens Simulator.

With a massive range of lenses that come in all manner of shapes and sizes, deciding between your focal lengths, apertures and zoom ratios isn’t always straight forward – particularly for newcomers to the world of DSLR.
You can simulate how different lenses ranging from wide to telescopic and different formats can interact to create different photographs.
If you find a combination between the lens and body that you like, click the “Keep Combination” button to save the combination and you can compare each combination later.

Make sure to try out the Nikkor Lens Simulator.